The Online Books Page

Books by R. C. Roark:

Books in the extended shelves:

• Roark, R. C. (Ruric Creegan): Abstracts of foreign and domestic patents relating to derris, lonchocarpus, tephrosia, and rotenone (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations, 1938), also by United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Abstracts of recent foreign and domestic patents relating to derris, lonchocarpus, tephrosia, and rotenone : (First supplement to E-446) (United States Department of Agriculture, Bureau of Entomology and Plant Quarantine, 1940), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Acarina (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, 1945), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A bibliography of chloropicrin, 1848-1932 (U.S. Dept. of Agriculture, 1934) (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A bibliography of nicotine. ([Govt. print. off.], 1936), also by United States. Bureau of Entomology and Plant Quarantine, R. L. Busbey, N. E. McIndoo, and R. L. Busbey (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A bibliography of nicotine (United States Department of Agriculture, Bureau of Entomology and Plant Quarantine, 1936), also by Ruth L. Busbey, N. E. McIndoo, and United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Collembola, orthoptera, dermaptera, odonata, isoptera, corrodentia, and mallophaga (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, 1942), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A digest of information on allethrin (U.S. Government Printing Office, 1952), also by United States. Bureau of Entomology and Plant Quarentine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A digest of information on chlordane (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Agricultural Research Administration, 1951), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A digest of information on toxaphene (U.S. Dept. of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1950), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A digest of the literature of derris (deguelia) species used as insecticides, 1747-1931 (U.S. Dept. of Agriculture, 1932) (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Digest of the literature on DDT (United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1946), also by N. E. McIndoo and United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Digest of the literature on DDT (United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1947), also by N. E. McIndoo and United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A digest of the literature on DDT through April 30, 1944 (United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1944), also by N. E. McIndoo and United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Diptera (United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1945), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Hexaethyl tetraphosphate (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, 1947), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): The history of the use of derris as an insecticide. Part II. the period 1919-1928 (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations, 1939), also by United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Hymenoptera (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, 1944), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): An index of chemicals mentioned in the Review of United States patents relating to pest control, issued in 1931 ([s.n., 1931) (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Insect powder (U.S. Dept. of Agriculture, 1920), also by C. C. McDonnell and George Lawrence Keenan (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Lepidoptera (United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1944) (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A list of arthropods, arranged accoring to order, family, and genus, and their susceptibility to rotenone and the rotenoids (United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1945) (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): List of common names used for species of Derris in connection with insecticidal properties (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations, 1939), also by United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A list of publications, on 2, 2-bis (parachlorophenyl)-1, 1, 1-trichloroethane (called DDT) from 1874 to April 30, 1944, inclusive ([Washington], 1944), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): List of publications on DDT (United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1945), also by United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): List of publications on DDT (United States Department of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1945), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): List of United States patents issued from 1917 to 1933 inclusive . ([The Bureau], 1934), also by United States. Bureau of Entomology and Plant Quarantine. Insecticide Division and United States. Bureau of Chemistry and Soils. Insecticide Division (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Lonchocarpus (barbasco, cube, and timbo) -- a review of recent literature (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations], 1938), also by United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Lonchocarpus species (Barbasco, Cube, Haiari, Nekoe, and Timbo) used as insecticides (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations, 1936) (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): References to reviews and popular articles on derris (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, Division of Insecticide Investigations, 1938), also by United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A review of information on anabasine (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, 1941), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A review of information on anabasine and nornicotine, 1938-1944 (U.S. Dept. of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1945), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A review of the insecticidal uses of rotenone and rotenoids from derris, lonchocarpus (cube and timbo), tephrosia, and related plants. Part IV, hemiptera (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, 1943), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A review of the insecticidal uses of rotenone and rotenoids from derris, lonchocarpus (cube and timbo), tephrosia, and related plants. Part VI, coleoptera (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, 1943), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A review of the insecticidal uses of rotenone and rotenoids from derris, lonchocarpus (cube and timbo), tephrosia, and related plants. Part V, anoplura (U.S. Dept. of Agriculture, Bureau of Entomology and Plant Quarantine, 1943), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): A review of the insecticidal uses of rotenone and rotenoids from derris, lonchocarpus (cube and timbo), tephrosia, and related plants. Part III, homoptera (United States Department of Agriculture, Bureau of Entomology and Plant Quarantine, 1943), also by United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigations (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Review of United States patents relating to pest control (U.S. Dept. of Agriculture, Bureau of Chemistry and Soils, Insecticide Division, 1928), also by United States. Entomology Research Branch. Pesticide Chemicals Research Section, United States. Entomology Research Branch. Section of Insecticide Investigations, United States. Bureau of Entomology and Plant Quarantine. Division of Insecticide Investigation, and United States. Bureau of Chemistry and Soils. Insecticide Division (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Siphonaptera (U.S. Dept. of Agriculture, Agricultural Research Administration, Bureau of Entomology and Plant Quarantine, 1945), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)
• Roark, R. C. (Ruric Creegan): Some new or little-used insecticides worthy of further testing. Part I, Copper-arsenic compounds (U.S. Department of Agriculture, Bureau of Entomology and Plant Quarantine, 1942), also by United States. Bureau of Entomology and Plant Quarantine (page images at HathiTrust)

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