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Institution
Collection
Format
Subject
Water quality
92
Groundwater
78
Groundwater Quality
39
Hydrology
36
Stream measurements
34
Streamflow
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33
Water Pollution
28
River sediments
24
Water-supply
20
Groundwater Pollution
20
Hydrogeology
17
Water quality management
15
Suspended sediments
15
Water chemistry
15
Water quality biological assessment
12
Trace elements Environmental aspects
11
Water table
9
Lakes
9
Water resources development
8
Irrigation Environmental aspects
8
Trace elements in water
8
Water Sampling
8
Water levels
7
Coal mines and mining Environmental aspects
7
Nutrient pollution of water
7
Water temperature
6
Aquatic plants
6
Geochemistry
6
Groundwater flow
6
Habitat (Ecology)
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Author
527
Geological Survey (U.S.)
122
Geological Survey (U.S.),
29
United States. Environmental Protection Agency
19
United States. Bureau of Reclamation
15
Welch, Alan H.
14
Williams, Rhea P.
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13
United States. Department of Energy
12
National Water-Quality Assessment Program (U.S.)
12
United States. Bureau of Land Management
11
New York (State). Department of Environmental Conservation
11
United States. National Park Service
9
New Martinsville (W. Va.)
9
United States. Army. Corps of Engineers
8
U.S. Fish and Wildlife Service
7
Dodge, Kent A.
7
Miller, Kimberly F.
7
Parliman, D. J.
7
Young, H. W. 1942-
6
Calzia, J. P.
6
Hornberger, Michelle I.
6
Kimbrough, Robert, 1957-
5
Kleeschulte, Michael J.
5
Minnesota Pollution Control Agency
5
Nystrom, Elizabeth A.
5
United States. Bureau of Indian Affairs
5
Wisconsin
5
Woods, Paul F.
4
Atkins, John T.
4
Bartholomay, Roy C.
4
California. Department of Water Resources
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Language
Genre
Literary Form
Region
45
California
41
Colorado
30
Nevada
27
United States
24
Idaho
21
Florida
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19
North Carolina
17
New York (State)
17
Ohio
17
Wisconsin
14
Clark Fork Watershed (Mont. and Idaho)
14
Montana
14
Washington (State)
14
West Virginia
13
Arizona
12
Minnesota
12
Virginia
11
New Mexico
11
Oregon
10
Alaska
10
Maryland
10
New Jersey
10
Tennessee
9
Kentucky
9
Texas
9
Utah
8
Georgia
8
Illinois
8
Louisiana
8
Missouri
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Year of Publication