| Call number | Item |
| G | Geography, Anthropology, Folklore, Recreation (Go to start of category) |
| GC | Oceanography (Go to start of category) |
| GC89 .S413 1990 | ![[Info]](https://onlinebooks.library.upenn.edu/info.gif) Sea-Level Change (1990), by National Research Council Geophysics Study Committee (page images with commentary at NAP) |
| GC101.2 .R53 1961 | Investigation of a Radioactivity Technique for the Determination of Dissolved Oxygen (1961), by Harold G. Richter and Arthur S. Gillespie (page images at HathiTrust) |
| GC125 .C5 | A Study of the Salinity of the Surface Water in the North Pacific Ocean and in the Adjacent Enclosed Seas (Smithsonian Miscellanous Collections v60 #13 (Publication #2153); 1912), by Austin Hobart Clark |
| GC150.7 .E9 | Evolution of Physical Oceanography (1981), ed. by Bruce A. Warren and Carl Wunsch (PDF files at MIT) |
| GC173 .P74 S82 | The Stability of Low-Latitude Sea-Surface Temperatures: An Evaluation of CLIMAP Reconstruction With Emphasis on the Positive SST Anomalies (Washington: U.S. Dept. of Energy, Office of Energy Research, Office of Basic Energy Sciences, Carbon Dioxide Research Division, 1985), by Warren L. Prell (page images at HathiTrust) |
| GC190 .N35 1994 | The Ocean's Role in Global Change: Progress of Major Research Programs (1994), by National Research Council Ocean Studies Board (page images with commentary at NAP) |
| GC222 .H3 U56 | The Tsunami of March 9, 1957, As Recorded at Tide Stations (US Coast and Geodetic Survey technical bulletin #6; Washington: GPO, 1959), by G. G. Salsman (page images at HathiTrust) |
| GC481 .N53 | Cruise of School-Ship "Mercury" in Tropical Atlantic Ocean, 1870-1871, by New York (New York) Department of Public Charities and Correction (page images at MOA) |
| GC561 .N67 | The Norwegian North-Atlantic Expedition, 1876-1878 (Oslo: Grøndahl and Søn, 1882), by Henrik Mohn, contrib. by C. Wille (page images and HTML in Iceland) |
| GC1085 .M43 2015 | Marine Anthropogenic Litter (Cham et al.: Springer Open, c2015), ed. by Melanie Bergmann, Lars Gutow, and Michael Klages (PDF and Epub with commentary at Springer Open) |
| GC1085 .O34 1985 | Oil in the Sea: Inputs, Fates, and Effects (1985), by National Research Council Ocean Studies Board (page images with commentary at NAP) |
| GC1221 .U55 2011 | Deep Water: The Gulf Oil Disaster and the Future of Offshore Drilling (2011), by United States National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling (PDF with commentary at govinfo.gov) |
| GE | Environmental Sciences (Go to start of category) |
| GE1 .E525 | Environment and Society (partial serial archives) |
| GE25 .G73 2005 | The Search for a Common Language: Environmental Writing and Education (Logan, UT: Utah State University Press Logan, c2005), ed. by Melody Graulich and Paul Crumbley (PDF with commentary at usu.edu) |
| GE30 .G74 | Electronic Green Journal (1994-) (full serial archives) |
| GE40 .E6 | Environmental Humanities (2012-) (full serial archives) |
| GE40 .S55 1999 | The Hoodwinking of a Nation (pre-publication version of "Hoodwinking the Nation"), by Julian Lincoln Simon (HTML at juliansimon.com) |
| GE60 | Green Jobs: Towards Decent Work in a Sustainable, Low-Carbon World (2008), by Michael Renner, Sean Sweeney, and Jill Kubit (PDF with commentary at unep.org) |
| GE70 .E58 2013 | Environmental Leadership Capacity Building in Higher Education: Experience and Lessons from Asian Program for Incubation of Environmental Leaders (c2013), ed. by Takashi Mino and Keisuke Hanaki (multiple formats with commentary at SpringerLink) |
| GE80 .E54 2002 | Engineering and Environmental Challenges: Technical Symposium on Earth Systems Engineering (2002), by National Academy of Engineering (page images with commentary at NAP) |
| GE80 .G58 1993 | Global Change Research and NASA's Earth Observing System (1993), by United States Congress Office of Technology Assessment |
| GE80 .N38 1993 | Research to Protect, Restore, and Manage the Environment (1993), by National Research Council Commission on Life Sciences (page images with commentary at NAP) |
| GE105 .G74 1994 | The Greening of Industrial Ecosystems (1994), ed. by Braden R. Allenby and Deanna J. Richards (page images at NAP) |
| GE105 .T44 2012 | Telemorphosis ("Theory in the Era of Climate Change v1"; Ann Arbor: Open Humanities Press, 2012), ed. by Tom Cohen (HTML and PDF with commentary at Open Humanities Press) |
| GE149 .E26 2020 | Earth 2020: An Insider's Guide to a Rapidly Changing Planet (Cambridge, UK: Open Book Publishers, c2020), ed. by Philippe Daniel Tortell (multiple formats with commentary at Open Book Publishers) |