Author
U.S. Fish and Wildlife Service
301
Geological Survey (U.S.),
196
Geological Survey (U.S.)
177
United States. National Marine Fisheries Service
115
ScienceDirect (Online service)
112
United States. Department of the Interior. Office of Inspector General,
90
SpringerLink (Online service)
73
United States. National Marine Fisheries Service,
73
Alaska Fisheries Science Center (U.S.)
70
Colorado. Division of Wildlife
61
U.S. Fish and Wildlife Service,
58
National Water-Quality Assessment Program (U.S.)
45
United States. Congress. House. Committee on Resources
45
Northeast Fisheries Science Center (U.S.)
37
United States. Congress. House. Committee on Natural Resources,
37
United States. Forest Service
37
United States. Congress. Senate. Committee on Environment and Public Works,
31
United States. Congress. Senate. Committee on Environment and Public Works
30
United States. Environmental Protection Agency. Office of Water
30
Library of Congress. Congressional Research Service,
29
Colorado. Parks and Wildlife
28
Northeast Fisheries Science Center (U.S.),
28
United States. Bureau of Reclamation
26
United States. Congress. Senate. Committee on Commerce, Science, and Transportation,
26
Northeast Fisheries Center (U.S.)
25
United States. National Oceanic and Atmospheric Administration
24
Pacific Islands Fisheries Science Center (U.S.),
23
United States. National Park Service
23
Northwest Fisheries Science Center (U.S.)
22
Northwest Fisheries Science Center (U.S.),
21
United States. Bureau of Land Management
21
Washington (State). Department of Fish and Wildlife
21
United States,
20
U.S. Fish and Wildlife Service. Region 1
19
Smithsonian Institution
18
United States. Congress. House. Committee on Resources. Subcommittee on Fisheries Conservation, Wildlife, and Oceans
18
Alaska Fisheries Science Center (U.S.),
17
Farrell, Anthony Peter, 1952-
17
Randall, David J., 1938-
17
United States. Army. Corps of Engineers
17
Colorado. Aquatic Wildlife Research Section
16
EBSCOhost
16
Recovery Program for Endangered Fish of the Upper Colorado River Basin
16
United States. Environmental Protection Agency
16
United States. Congress. Senate. Committee on Commerce, Science, and Transportation
15
United States. Congress. Senate. Committee on Energy and Natural Resources
15
Southeast Fisheries Science Center (U.S.)
14
Upper Midwest Environmental Sciences Center (Geological Survey)
13
Southwest Fisheries Center (U.S.)
12
United States. Congress. Senate. Committee on Foreign Relations
12
more ...