Author
ScienceDirect (Online service)
161
SpringerLink (Online service)
99
Cranshaw, Whitney
57
Colorado State University. Cooperative Extension Service
56
Colorado State University. Extension
26
Smithsonian Institution
26
United States. Forest Service
25
Wigglesworth, Vincent B. Sir, 1899-1994
23
Treherne, J. E.
18
United States. Forest Service. Alaska Region
14
Peairs, Frank B.
12
United States. Agricultural Research Service
12
United States. Animal and Plant Health Inspection Service. Marketing and Regulatory Programs,
12
Holsten, Edward H. 1944-
11
United States. Animal and Plant Health Inspection Service
11
Colorado Agricultural Experiment Station
10
United States. Department of Agriculture
10
United States. Forest Health Technology Enterprise Team,
10
Beament, James, 1921-2005
9
Berridge, Michael J.
9
Biological Pest Control Program (Colo.). Insectary
9
Evans, P. D.
9
SpringerLink (Online Service)
9
Colorado Natural Heritage Program
8
Gillette, C. P. 1859-1941
8
Pacific Northwest Research Station (Portland, Or.)
7
Gilbert, Lawrence I. 1929-2017,
6
Infobase,
6
International Congress of Entomology
6
Jurenka, Russell,
6
Kondratieff, B. C.
6
Maramorosch, Karl
6
New, T. R.,
6
U.S. Fish and Wildlife Service. Region 6
6
United States. Forest Health Protection
6
Zimmerman, Rick J. 1957-
6
BBC Worldwide Ltd
5
Barbosa, Pedro, 1944-
5
EBSCOhost
5
Geological Survey (U.S.),
5
Harris, Kerry F.
5
Jacobi, William R.
5
Kerkut, G. A.,
5
Oxford Scholarship Online
5
Rocky Mountain Research Station (Fort Collins, Colo.)
5
Smithsonian Institution. Press
5
United States. Forest Service. Southern Region
5
Blomquist, Gary J.
4
Colorado. Division of Plant Industry
4
Flint, Oliver S.
4
more ...