Author
Batson, Wade T
2
Duke, James A., 1929-2017
2
Foster, Steven, 1957-
2
Berrett, LaMar C
1
Canadian Forest Service
1
Chef Fritz Blank Culinary Archive and Library (University of Pennsylvania)
1
Cronquist, Arthur
1
Culinary Collection (University of Pennsylvania)
1
Decade of North American Geology Project
1
Duke, James A., 1929-
1
Fernald, Merritt Lyndon, 1873-1950
1
Fodor's Travel Publications, Inc
1
Geological Society of America Northeastern Section
1
Gleason, Henry A (Henry Allan), 1882-
1
Gleason, Henry A (Henry Allan), 1882-1975
1
Gotham Book Mart Collection (University of Pennsylvania)
1
Helmhausen, Ole
1
Hutchinson, Verna
1
Kavasch, E. Barrie
1
Kinsey, Alfred C (Alfred Charles), 1894-1956
1
Lindquist, O. H
1
McDonald, Jerry N
1
Meurer, Hans Günther
1
Mobil Oil Corporation
1
Montgomery, F. H (Frederick Howard), 1902-
1
Montgomery, F. H (Frederick Howard), 1902-1978
1
National Audubon Society
1
National Wildlife Federation
1
Nystrom, K. L (Kathryn L.)
1
Peterson, Lee
1
Peterson, Lee, 1971-
1
Peterson, Roger Tory, 1908-1996
1
Pratson, Frederick John
1
Roberts, Charles G. D., Sir, 1860-1943
1
Roger Tory Peterson Institute
1
Rollins, Reed C (Reed Clark), 1911-1998
1
Rose, A. H (Arthur H.)
1
Roy, David C
1
Skwara, Theresa, 1949-
1
Swink, Floyd
1