Author
Geological Survey (U.S.)
693 results
Grover, Nathan Clifford, 1868-1956
236 results
National Water-Quality Assessment Program (U.S.)
227 results
ProQuest (Firm)
226 results
SpringerLink (Online service)
125 results
Wells, J. V. B.
116 results
United States. Environmental Protection Agency
100 results
United States. Bureau of Reclamation
97 results
United States. Environmental Protection Agency. Office of Water
95 results
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment
87 results
New York (State)
75 results
Paulsen, Carl G.
74 results
United States. Congress. Senate. Committee on Environment and Public Works
74 results
California. State Water Resources Control Board
72 results
Parker, Glenn L. (Glenn Lane), 1884-
65 results
Virginia
65 results
North Carolina
62 results
Wyoming
62 results
United States. National Park Service
61 results
Illinois
60 results
Love, S. K. (Samuel Kenneth), 1903-1995
60 results
Pennsylvania
59 results
West Virginia
59 results
Belitz, Kenneth
55 results
Colorado
51 results
Maryland
51 results
Kentucky
50 results
Missouri
50 results
New Mexico
50 results
United States. Bureau of Land Management
46 results
Indiana
45 results
Kansas
45 results
Ohio
45 results
Tennessee
44 results
Louisiana
43 results
Texas
43 results
United States. Government Accountability Office
43 results
Oregon
41 results
U.S. Fish and Wildlife Service
41 results
Utah
41 results
Idaho
39 results
Minnesota
38 results
Wisconsin
38 results
United States. Congress. House. Committee on Transportation and Infrastructure
37 results
California
36 results
Ground Water Ambient Monitoring and Assessment Program (Calif.)
36 results
Vermont
36 results
NetLibrary, Inc
35 results
Georgia
34 results
Mississippi
33 results
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