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BioScience - A short article by David A. Grimaldi and Michael S. Engel about the role that descriptive science plays in modern biology.
G.K. Gilbert's original 1877 publication from the Geographical and Geological Survey of the Rocky Mountain Region.
Original 1880 text by G. K. Gilbert.
Jane Goodall Institute - Research program dedicated to the study of chimpanzees.
USGS - Water-resources data collected at approximately 1.5 million sites.
Google - Research database allows searching of the scholarly literature.