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Filed under: Sunspots- Publikationen der Sternwarte des Eidenössichen Polytechnikums zu Zürich (Druck von Schulthess & Co., 1897), by Eidgenössische Sternwarte Zürich, Alfred Wolfer, and Zürich Wolfstiftung der Eidgenössischen Sternwarte (page images at HathiTrust; US access only)
- Climatic cycles and tree-growth (Carnegie Institution of Washington, 1919), by A. E. Douglass (page images at HathiTrust)
- The depths of the universe (C. Scribner's sons, 1924), by George Ellery Hale (page images at HathiTrust; US access only)
- The position of the sun's axis as determined from photographs of the sun taken in the years 1874 to 1912 (Printed under the authority of H.M. Stationery Off. by Neill, Edinburgh, 1913), by Royal Greenwich Observatory and Frank Watson Dyson (page images at HathiTrust)
- Photo-heliographic results 1874 to 1885 being supplementary results from photographs of the sun taken at Greenwich, at Harvard college, U.S.A., at Melbourne, in India, and in Mauritius in the years 1874 to 1885: and measured and reduced at the Royal observatory, Greenwich (Printed for H.M. Stationery off., by Neill & co., limited, 1907), by Greenwich Royal Observatory (page images at HathiTrust)
- Atomic lines in the sun-spot spectrum (Princeton, N.J., 1933), by Charlotte Emma Moore (page images at HathiTrust)
- Heliographic positions of sun-spots observed at Hamilton College from 1860-1870 (Carnegie Institution of Washington, 1907), by C. H. F. Peters and Edwin Brant Frost (page images at HathiTrust)
- Sun-spot drawings made at the Georgetown College Observatory in 1850, September 20 to November 6 (Washington, D.C., 1898), by Benedict Sestini and D.C.) Georgetown College Observatory (Washington (page images at HathiTrust)
- Earth and sun; an hypothesis of weather and sunspots (Yale University Press; [etc., etc.], 1923), by Ellsworth Huntington, Henry Helm Clayton, and Theodore L. Glasgow Memorial Publication Fund (page images at HathiTrust)
- Sunspots in action (Ronald Press Co., 1947), by Harlan True Stetson (page images at HathiTrust)
- Beobachtungen de sonnenflecken zu Anclam (In Commission bei W. Engelmann, 1874), by Gustav Spörer (page images at HathiTrust)
- Magnetic observation of sunspots, 1917-1924 (Carnegie institution of Washington, 1938), by George Ellery Hale and Seth Barnes Nicholson (page images at HathiTrust)
- Solar cycles. (Smithsonian Institution, 1947), by Henry Helm Clayton (page images at HathiTrust)
- Die Magister Johann Fabricius und die Sonnenflecken nebst einem Excurse über David Fabricius : eine Studie (Veit, 1894), by Gerhard Berthold (page images at HathiTrust)
- Solar relations to weather and life. (The Clayton weather service, 1943), by Henry Helm Clayton (page images at HathiTrust)
- Lezionne tratta dal Corso libero di astrofisica tenuto nella R. Università 1919-20 e 1920-1921 (Scuola Tipografica Salesiana, 1924), by Giuseppe Alessandro Favaro (page images at HathiTrust; US access only)
- Watch upon a star (Dept. of Commerce, National Oceanic and Atmospheric Administration : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1977), by United States. National Oceanic and Atmospheric Administration (page images at HathiTrust)
- ORA projects 03941 and 03942 : final reports (Office of Research Administration, 1963), by James L. Amick, Helen Walter Dodson, University of Michigan. Dept. of Astronomy, and University of Michigan. Dept. of Aeronautical and Astronautical Engineering (page images at HathiTrust; US access only)
- Mitteilungen über die Sonnenflecken v. 1-2 (Schulthess [etc.], 1856), by Eidgenössische Sternwarte Zürich and Rudolf Wolf (page images at HathiTrust)
- Speculations. Solar heat, gravitation, and sun spots. (S.C. Griggs and Company, 1886), by J. H. Kedzie (page images at HathiTrust)
- Ueber synchronismus und antagonismus von vulkanischen Eruptionen und die beziehungen Derselben zu den Sonnenflecken und Erdmagnetischen variationen (W. Engelmann, 1863), by Emil Kluge (page images at HathiTrust)
- A multiplet table of astrophysical interest. Part I, Table of multiplets. Part II. Finding list of all lines in the table of multiplets (Distributed by U.S. Dept. of Commerce, Office of Technical Services, 1959), by Charlotte Emma Moore and United States. National Bureau of Standards (page images at HathiTrust)
- Astronomische Mittheilungen (Eidegenössische Sternwarte Zürich, [etc.], 1856), by Eidgenössische Sternwarte Zürich (page images at HathiTrust; US access only)
- Studies on the meteorological effects in the United States of the solar and terrestrial physical processes. Reprints from the Monthly weather review, December, 1902, January and February, 1903. (Weather bureau, 1903), by Frank H. Bigelow (page images at HathiTrust)
- Beobachtungen der sonnenflecken zu Anclam (W. Englemann, 1874), by Gustav Friedrich Wilhelm Sporer and Kunst und Volksbildung Prussia (Germany). Ministerium für Wissenschaft (page images at HathiTrust)
- Pi︠a︡tna na solnt︠s︡e i ikh dvizhenīe. (Moskva, 1886), by Aristarkh Apollonovich Belopolskiĭ (page images at HathiTrust)
- Taches solaires et periodicité de leur nombre, faisant partie de la Physique céleste, servant à montrer l'état physique du soleil. (Paris, 1866), by Petŭr Beron (page images at HathiTrust)
- Astronomische Mitteilungen der Eidgenössischen Sternwarte Zürich (Eidegenössische Sternwarte Zürich, 1856), by Eidgenössische Sternwarte Zürich (page images at HathiTrust; US access only)
- Beobachtungen der Sonnenflecken. II. Forsetzung der Publication XIII der Astronomischen Gesellschaft, gedruckt auf des Konigl. preussischen Ministeriums der Geistlichen, unterichts- und Medicinalangelegenheiten. (W. Engelmann, 1876), by Gustav Friedrich Wilhelm Spörer and Unterrichts- und Medizinal-Angelegenheiten Prussia (Germany). Ministerium der Geistlichen (page images at HathiTrust)
- Positions apparentes des taches solaires photographiees a Poulkovo par B. Hasselberg dans les années 1881-1888 ([s.n.], 1894), by Aristarkh Apollonovich Belopolʹskiĭ and M. Morine (page images at HathiTrust)
- Le grandi macchie solari del settembre, 1909 ... (Successori fratelli Fusi, 1909), by Mentore Maggini (page images at HathiTrust; US access only)
- Ueber die periodicität er sonnenflecken seit dem jahre 1618, vornehmlich in bezug auf die heliographische breite derselben, und nachweis einer erheblichen störung dieser periodicität während eines langen zeitraumes ... (Blochmann, 1889), by Gustav Friedrich Wilhelm Spörer (page images at HathiTrust)
- On solar changes of temperature and variations in rainfall in the region surrounding the Indian Ocean. (1900), by Norman Lockyer and William J. S. Lockyer (page images at HathiTrust)
- Professor Plassmann und das Sonnenfleckenphänomen; Weiteres zur geozentrischen Feststellung ... (Hephaestos-Verlag, 1914), by Johannes Schlaf (page images at HathiTrust; US access only)
- The sun's spotted area, 1832-1900. A statement of the mean daily area in each synodic rotation of the sun, based upon data colected at the Solar physics observatory, South Kensington. (Printed for H. M. Stationery off., by Wyman & sons, limited, 1902), by Norman Lockyer and Solar Physics Committee (Great Britain) (page images at HathiTrust)
- Measures of positions and areas of sun spots and faculae on photographs taken at Greenwich, Dehra Dun, and Melbourne : with the deduced heliographic longitudes and latitudes, 1878-1881. (H.M. Stationery Office, 1891), by Solar Physics Committee (Great Britain) (page images at HathiTrust)
- Results of measures made at the Royal Observatory, Greenwich, under the direction of W.H.M. Christie ... astronomer royal, of photographs of the sun taken at Greenwich, in India, and in Mauritius in the year 1901-1955. (Royal Greenwich Observatory [etc.], 1903), by Royal Greenwich Observatory (page images at HathiTrust)
- Etude photographique des taches solaires (Impr. de T'ou-sè-wè, 1913), by Stanislas Chevalier (page images at HathiTrust; US access only)
- Catalogue of recurrent groups of sun spots for the years 1874 to 1906 (Printed for H.M.S.O by Neill & Co., 1909), by Annie S. D. Maunder, W. H. M Christie, and Royal Greenwich Observatory (page images at HathiTrust)
- Magnetic storms, solar radiation and Washington temperture departures (Smithsonian Institution, 1948), by C. G. Abbot (page images at HathiTrust)
- Solar effects on VHF communications between a synchronous satellite relay and earth ground stations (National Aeronautics and Space Administration, 1969), by Sheldon Wishna, James R. Greaves, Goddard Space Flight Center, and United States National Aeronautics and Space Administration (page images at HathiTrust; US access only)
- A theoretical model for sunspot coolness (National Aeronautics and Space Administration ;, 1963), by R. K. Jaggi and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch (page images at HathiTrust; US access only)
- Die sonne und ihre flecken. (In commission bei Orell, Füssli & comp., 1861), by Rudolf Wolf (page images at HathiTrust)
- Über die Beziehungen der Sonnenfleckenperiode zu meteorologischen Erscheinungen. (W. Engelmann, 1877), by Friedrich Gustav Hahn (page images at HathiTrust)
- Über die kleinen Perioden der Sonnenflecken und ihre Beziehung zu einigen periodischen Erscheinungen der Erde. (K.K. Hof- und Staatsdruckerei, 1891), by Johannes Unterweger (page images at HathiTrust)
- Sur les relations des orages magnetiques et des phenomenes solaires. (Gauthier-Villars, 1912), by Jean Bosler (page images at HathiTrust; US access only)
- Periodicity of magnetic disturbances (s.n., 1897), by Arthur Harvey and Astronomical and Physical Society of Toronto (page images at HathiTrust)
- Drought and good seasons in South Africa (Printed at the "Times" office, 1889), by D. E. Hutchins (page images at HathiTrust)
- Die Theorie der Sonnenflecken : nach den neuesten wissenschaftlichen Forschungen (J. Springer, 1884), by J. E. Broszus (page images at HathiTrust)
- Mitteilungen über Sonnenflecken 1856-1866 (Rudolf Wolf, 1856) (page images at HathiTrust; US access only)
- Magnetic field of sunspots (National Aeronautics and Space Administration, for sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Va., 1965), by L. Ė. Gurevich, Aleksandri Ignatʹevich Lebedinskiĭ, and United States National Aeronautics and Space Administration (page images at HathiTrust)
- Speculations. Solar heat, gravitation and sun spots. (S.C. Griggs and company, 1891), by J. H. Kedzie (page images at HathiTrust)
- Sunspot cycle and ionospheric storms (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1965., 1965), by Raymond J. Cormier, K. L. Smallwood, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Comparisons of power spectrums of artificial time series with spectrum of a plage index (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1966., 1966), by Ralph Shapiro and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Double sunspot-cycle variation in terrestrial magnetic activity, 1884-1963 (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1966., 1966), by Edwin J. Chernosky and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Solar flare occurrence as a function of sunspot size (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1966., 1966), by Isadore Enger, Fred Ward, Delos C. Jensen, Ronald T. Podsiadlo, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Determination of the solar-rotation rate from the motion of identifiable features (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1966., 1966), by Fred Ward and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- The longitudinal proper motion of sunspots and the solar rotation rate (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1966., 1966), by Fred Ward and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- A statistical summary of solar flare reports and observatory practices for the period 1955-1964 (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1967., 1967), by Delos C. Jensen, Hans J. E. Fischer, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- The Influence of radio brightness temperature on solar flare prediction (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1967., 1967), by Alfred E. Reilly, Isadore Enger, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Manual on short-term prediction of ionospheric geomagnetic storms and radio propagation forecasting service (L.G. Hanscom Field, Bedford, Massachusetts, Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1968., 1968), by R. A. Zevakina, L©±i©Ơudmila Nikolaevna L©±i©Ơakhova, E. V. Lavrova, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Flare occurrence tomorrow as a function of area and flariness of sunspot today (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1969., 1969), by Alfred E. Reilly, Abraham Pavlowitz, Isadore Enger, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- The structure and development of a sunspot group on July 4-8, 1966 (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1970., 1970), by N. V. Steshenko and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- The determination of the magnetic field strength from different absorption lines (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1970., 1970), by M. Dzh Guseinov and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Periodic fluctuations in fluxes of local radio-emission sources of the sun (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, United States Air Force, 1970., 1970), by G. B. Gelfreykh and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Areal mapping : A preliminary assessment of its applicability to the ionosphere (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Air Force Systems Command, United States Air Force, 1970/, 1970), by C. M. Rush, Robert E. Cookingham, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Global morphology of ionospheric scintillations (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Air Force Systems Command, United States Air Force, 1970., 1970), by Jules Aarons, Richard S. Allen, Herbert E. Whitney, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Results obtained during the campaign for integrated observations of solar flares (CINOF) (Air Force Cambridge Research Laboratories, Air Force Systems Command, United States Air Force, 1975), by M. A. Shea, D. F. Smart, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Dichotomy in geomagnetic disturbance and its solar origin (Air Force Cambridge Research Laboratories, Air Force Systems Command, United States Air Force, 1973), by Edwin J. Chernosky and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Late June 1972 Campaign for Integrated Observations of Solar Flares (Air Force Cambridge Research Laboratories, Air Force Systems Command, United States Air Force, 1974), by D. M. Rust, J. Rene Roy, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Conditional probabilities of the geomagnetic index Ap (Hanscom AFB, Massachusetts : Air Force Geophysics Laboratories, Air Force Systems Command, United States Air Force, 1976., 1976), by Philip M. Pazich and U.S. Air Force Geophysics Laboratory (page images at HathiTrust)
- Magnetic fields in the solar atmosphere (Hanscom AFB, Massachusetts : Air Force Geophysics Laboratories, Air Force Systems Command, United States Air Force, 1976., 1976), by J. M. Beckers and U.S. Air Force Geophysics Laboratory (page images at HathiTrust)
- The objective construction of a solar-geophysical data base (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1971., 1971), by Richard G. Hendl, Isadore Enger, Donald A. Chisholm, Ronald T. Podsiadlo, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- New views of sunspots. (Air Force Cambridge Research Laboratories, Air Force Systems Command, United States Air Force, 1975), by J. M. Beckers and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Flares, force-free fields, emerging flux, and other phenomena in McMath 14943 (September 1977) (Hanscom AFB, Massachusetts : Air Force Geophysics Laboratory, Air Force Systems Command, United States Air Force, 1978., 1978), by Donald F. Neidig, Philip H. Wiborg, Howard L. DeMastus, and U.S. Air Force Geophysics Laboratory (page images at HathiTrust)
- An objective baseline for flare prediction (L.G. Hanscom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1972., 1972), by Ronald T. Podsiadlo and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Influence of atmospheric density variations of solar origin on meteor rates (Boulder, Colo. : U.S. Dept. of Commerce, Environmental Science Services Administration, Institute for Telecommunication Sciences, 1968., 1968), by C. D. Ellyett, United States. Environmental Science Services Administration. Research Laboratories, and Institute for Telecommunication Sciences (page images at HathiTrust)
- Long-range forecast of geomagnetic activity, 1970-1973 (Boulder, Colo. : Space Disturbances Laboratory, 1969., 1969), by R. H. Olson and Space Disturbances Laboratory (U.S.) (page images at HathiTrust)
- Delle rag[g]i solari (In Roma : Appresso Giacomo Mascardi, MDCXIII [1613], 1613), by Galileo Galilei, Giacomo Mascardi, Christoph Scheiner, Angelo de Filiis, Marcus Welser, Wega Firenze, and Pasquale Sconzo (page images at HathiTrust)
- Sol ellipticus (Augustae Vindelicorum : Typis Christophori Mangij, Anno Domini MDCXV [1615], 1615), by Christoph Scheiner, Marcel Destombes, and Christoph Mang (page images at HathiTrust)
- Pointing error correction for millimeter wave spectroheliograms (L.G. Hansom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1971., 1971), by Michael J. Neary and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Solar observations at 8.6-mm wavelength (L.G. Hansom Field, Bedford, Massachusetts : Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, 1970., 1970), by Paul M. Kalaghan, Larry E. Telford, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- A physical mechanism for the production of spot related solar prominences (Air Force Cambridge Research Laboratories, Air Force Systems Command, United States Air Force, 1974), by Marvin L. White and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- The latitudinal motion of sunspots and solar meridional circulations (L.G. Hanscom Field, Massachusetts : Air Force Cambridge Research Laboratories, Air Force System Command, United States Air Force, 1972., 1972), by Fred Ward and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Solar activity in McMath region 10789 during disk passage, 12 to 15 June 1970 (L.G. Hanscom Field, Massachusetts : Air Force Cambridge Research Laboratories, Air Force System Command, United States Air Force, 1972., 1972), by Anne L. Carrigan, John P. Castelli, and Air Force Cambridge Research Laboratories (U.S.) (page images at HathiTrust)
- Climatic cycles and tree-growth (Carnegie Institution of Washington, 1919), by A. E. Douglass (page images at HathiTrust)
- Ueber die Beziehungen der Sonnenfleckenperiode zu meteorologischen Erscheinungen (W. Engelmann, 1877), by F. G. Hahn (page images at HathiTrust)
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