Author
U.S. Fish and Wildlife Service
69
Miller, Gerrit S. (Gerrit Smith), 1869-1956
46
Smithsonian Institution
38
Elliot, Daniel Giraud, 1835-1915
36
Osgood, Wilfred Hudson, 1875-1947
36
Pennsylvania Game Commission
36
ProQuest Ebook Subscriptions
33
United States. National Park Service
32
Audubon, John James, 1785-1851
31
Bewick, Thomas, 1753-1828
31
ProQuest (Firm)
31
Ciba Foundation
30
Hall, E. Raymond (Eugene Raymond), 1902-1986
30
Jones, J. Knox
27
Attenborough, David, 1926-
26
SpringerLink (Online service)
26
National Geographic Society (U.S.)
23
Wilson, Don E.
23
Zoological Society of London
23
Bachman, John, 1790-1874
22
Kalman, Bobbie
21
Smithsonian Institution. Office of the Secretary
21
Field Museum of Natural History
20
Heller, Edmund, 1875-1939
19
National Audubon Society
19
United States. Bureau of Land Management
19
Schaller, George B.
18
Burt, William Henry, 1903-1987
17
Merriam, C. Hart (Clinton Hart), 1855-1942
17
Whitaker, John O.
17
Corbet, G. B. (Gordon Barclay)
16
Godman, John D. (John Davidson), 1794-1830
16
Hershkovitz, Philip
16
Paradiso, John L.
16
Macdonald, David W. (David Whyte)
15
American Society of Mammalogists
14
Sanborn, Colin Campbell, 1897-1962
14
Austin, C. R. (Colin Russell), 1914-2004
13
Bailey, Vernon, 1864-1942
13
British Broadcasting Corporation
13
United States. Forest Service
13
Walker, Ernest P. (Ernest Pillsbury), 1891-1969
13
Beilby, Ralph, 1743 or 1744-1817
12
Burton, Maurice, 1898-1992
12
Discovery Channel (Firm)
12
Eisenberg, John Frederick
12
Gidley, James Williams, 1866-1931
12
Hoffmann, Robert S.
12
Kingdon, Jonathan
12
Lydekker, Richard, 1849-1915
12
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