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Institution
Collection
Subject
Hydrology
Water quality
20
Groundwater
17
Streamflow
17
Water-supply
7
Aquifers
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6
Groundwater Quality
6
Stream measurements
4
Fertilizers Environmental aspects
4
Nutrient pollution of water
4
Rivers
3
Aquatic ecology
3
Coal mines and mining Environmental aspects
3
Ecology
3
Geographic information systems
3
Groundwater Pollution
3
Radioactive waste sites
3
Springs
3
Strip mining Environmental aspects
3
Water table
3
Wetlands
2
Acid mine drainage
2
Atmospheric deposition
2
Basins (Geology)
2
Biotic communities
2
Environmental impact analysis
2
Estuaries
2
Florida
2
Freshwater ecology
2
Gates of the Arctic National Park and Preserve (Alaska)
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Author
113
Geological Survey (U.S.)
67
Geological Survey (U.S.),
12
United States. Bureau of Land Management
6
Hall, Dennis C.
5
Southwest Florida Water Management District (Fla.)
5
United States. National Park Service
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4
Colorado Geological Survey
4
Field, Stephen J. 1935-
4
Hofstra, Warren E.
4
National Water-Quality Assessment Program (U.S.)
4
Robertson, Dale M.
4
U.S. Fish and Wildlife Service
4
United States. Forest Service
4
Wisconsin. Department of Natural Resources
3
Fishel, David K.,
3
Green, W. Reed
3
Kimbrough, Robert, 1957-
3
Kleeschulte, Michael J.
3
Ladd, P. B.
3
Lewelling, B. R.,
3
Montana
3
Stevens, Michael R.
3
United States. Bonneville Power Administration
2
Alaska Energy Authority
2
Aulenbach, Brent T.,
2
Bales, Jerad
2
Bauch, Nancy J.
2
Boyd, Robert A. 1965-
2
Bradenton (Fla.). Public Works Department
2
Burlington (Iowa)
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Language
Literary Form
Region
21
Colorado
16
Florida
15
Wisconsin
10
United States
8
Utah
7
Pennsylvania
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6
Alaska
6
Illinois
6
Jefferson County
6
Michigan
6
Missouri
6
North Carolina
6
Oklahoma
6
Oregon
5
Texas
4
Arkansas
4
Georgia
4
Hawaii
4
Iowa
4
Montana
4
Ohio
4
Wyoming
3
Massachusetts
3
New Jersey
3
New Mexico
3
Newberry Volcano
3
Puerto Rico
3
Saint Charles County
3
South Dakota
3
York County
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Year of Publication