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United States. Forest Service
77
Clarence J. Marshall Memorial Library Fund
65
Food and Agriculture Organization of the United Nations
62
British Small Animal Veterinary Association
38
ProQuest Ebook Subscriptions
29
United States. Soil Conservation Service
27
ProQuest (Firm)
26
United States. Department of Agriculture
25
United States. Agricultural Research Service
22
Pacific Northwest Research Station (Portland, Or.)
21
North Central Forest Experiment Station (Saint Paul, Minn.)
17
Plumb, Donald C.
16
Tilley, Lawrence P.
16
Horst, R. Kenneth (Ralph Kenneth), 1935-
15
U.S. Fish and Wildlife Service
15
Smith, Francis W. K., Jr
14
Bistner, Stephen I.
13
British Crop Protection Council
12
Kirk, Robert Warren, 1922-
12
United States. Forest Service. Pacific Northwest Region
11
American Animal Hospital Association
10
Ford, Richard B. (Veterinarian)
10
Muir, William W., III, 1946-
10
United States. National Park Service
10
African Institute for Economic and Social Development
9
Dirr, Michael
9
Westcott, Cynthia, 1898-1983
9
Landis, Thomas D.
8
Papich, Mark G.
8
Thomson, W. T. (William Thomas)
8
United States. Forest Service. Southern Research Station
8
American Association of Avian Pathologists
7
Bonner, F. T.
7
Henderson, A. J.
7
Merck & Co
7
Northeastern Forest Experiment Station (Radnor, Pa.)
7
Seymour, John, 1914-2004
7
Sherma, Joseph
7
Taylor, John, 1753-1824
7
United States. Environmental Protection Agency
7
United States. Environmental Protection Agency. Region VIII
7
United States. Forest Service. Southern Region
7
University of California (System). Division of Agriculture and Natural Resources
7
Birchard, Stephen J.
6
Bohmont, Bert L.
6
Bullard, Ervin T.
6
Drobatz, Kenneth J.
6
Federal Crop Insurance Corporation. Product Development Branch
6
Gelatt, Kirk N.
6
Huang, P. M.
6
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