Author
United States. Department of Agriculture
168
Rutgers University. Extension Service
154
Headlee, Thomas J.
84
United States. Forest Service
75
Farley, Arthur J. (Arthur James), 1885-
64
Martin, William Hope, 1890-
53
United States. Agricultural Research Service
52
United States. Animal and Plant Health Inspection Service
48
New Jersey State College of Agriculture and Agricultural Experiment Station. Extension Service
44
ProQuest (Firm)
43
Merrill, Leland G. (Leland Gilbert), 1897-1957
41
ProQuest Ebook Subscriptions
41
Food and Agriculture Organization of the United Nations
39
Davis, Spencer H. (Spencer Harwood), 1916-
32
American Chemical Society. Division of Agrochemicals
31
American Chemical Society. Meeting
30
SpringerLink (Online service)
29
Hamilton, Clyde C. (Clyde Carney), 1890-
27
U.S. Fish and Wildlife Service
27
Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
24
Northeastern Forest Experiment Station (Radnor, Pa.)
23
British Crop Protection Council
22
New Jersey State College of Agriculture. Extension Service
22
Rutgers University. Cooperative Extension Service
22
Mississippi Agricultural and Forestry Experiment Station
21
Rocky Mountain Research Station (Fort Collins, Colo.)
18
Cook, Melville Thurston, 1869-1952
17
Canada/United States Spruce Budworms Program
16
National Agricultural Library (U.S.)
16
Treece, Robert Eugene, 1927-
16
Hansens, Elton J., 1916-2004
15
Vasvary, Louis M.
15
Zimdahl, Robert L.
15
ASTM Committee E-35 on Pesticides
14
Cook College. Cooperative Extension Service
14
Fleming, Walter E. (Walter Ernest), 1899-
14
Pacific Northwest Research Station (Portland, Or.)
14
Smith, John Bernhard, 1858-1912
14
United States. Cooperative State Research Service
14
United States. Forest Service. Pacific Northwest Region
14
United States. Science and Education Administration
14
Pacific Southwest Forest and Range Experiment Station (Berkeley, Calif.)
13
American Chemical Society. Division of Pesticide Chemistry
12
New Jersey Agricultural Experiment Station
12
American Phytopathological Society
11
Bishopp, F. C. (Fred Corry), 1884-1970
11
Pimentel, David, 1925-
11
United States. Entomology Research Division
11
Walton, William Randolph, 1873-1952
11
Westcott, Cynthia, 1898-1983
11
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