Author
National Audubon Society
146
ProQuest (Firm)
108
ProQuest Ebook Subscriptions
103
National Wildlife Federation
65
Mohlenbrock, Robert H., 1931-
53
JSTOR
44
Culinary Collection (University of Pennsylvania)
35
Peterson, Roger Tory, 1908-1996
33
Chef Fritz Blank Culinary Archive and Library (University of Pennsylvania)
32
Roger Tory Peterson Institute
31
Sibley, David, 1961-
23
Swash, Andy
23
Oceanography and Limnology Program (Smithsonian Institution)
22
United States. Environmental Protection Agency
22
Little, Elbert L. (Elbert Luther), 1907-2004
21
Howell, Steve N. G.
20
Weber, William A. (William Alfred), 1918-
20
Bessette, Alan E.
19
Alderfer, Jonathan K.
18
Smithsonian Institution
18
Bessette, Arleen R.
17
Kaufman, Kenn
17
United States. Forest Service
17
Bessette, Alan
16
National Geographic Society (U.S.)
16
Still, Rob
16
Zim, Herbert S. (Herbert Spencer), 1909-1994
16
Godfrey, Michael A., 1940-
14
Lincoff, Gary
14
Wittmann, Ronald C.
14
Abbott, R. Tucker (Robert Tucker), 1919-1995
13
Bartlett, R. D. (Richard D.), 1938-
13
Fassett, Norman C. (Norman Carter), 1900-1954
13
Glassberg, Jeffrey
13
Humann, Paul
13
Inskipp, Tim
13
Master Vision (Firm)
13
Petrides, George A.
13
Stokes, Donald W.
13
Stokes, Lillian Q.
13
Evans, Arthur V.
12
Royal Botanic Gardens, Kew
12
American Museum of Natural History
11
Arlott, Norman
11
Block, Timothy A.
11
CSIRO (Australia)
11
Conant, Roger, 1909-2003
11
Largent, David L.
11
Rhoads, Ann Fowler
11
Spellenberg, Richard
11
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