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Institution
Format
Subject
38
Water quality
37
Groundwater
16
Geology
15
Groundwater flow
15
Hydrogeology
14
Water-supply
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13
Aquifers
13
Groundwater Quality
11
Groundwater Pollution
11
Voyageurs National Park (Minn.)
9
Iron ores
9
Soil conservation
8
Geology, Stratigraphic
6
Manganese ores
6
Ore-dressing
6
Stream measurements
5
Chippewa National Forest (Minn.)
5
Land use Environmental aspects
5
Pesticides Environmental aspects
5
Runoff
5
Taconite
4
Flotation
4
Forest reserves Recreational use
4
Groundwater flow Mathematical models
4
Hydrology
4
Lakes
4
Mines and mineral resources
4
Ore deposits
4
Outdoor recreation
4
Trails
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Author
122
Geological Survey (U.S.)
28
Minnesota. Department of Natural Resources
20
National Water-Quality Assessment Program (U.S.)
16
United States. Soil Conservation Service
12
Delin, G. N.
12
Ruhl, J. F.
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12
United States. National Park Service
10
Minnesota Pollution Control Agency
9
Lindgren, Richard J.
9
Minnesota Geological Survey
8
Tornes, L. H.
8
United States. Bureau of Mines
7
Payne, G. A.
6
Lee, K. E.
6
Metropolitan Council of the Twin Cities Area
6
Stark, James R.
5
Goldstein, Robert M.
5
Lorenz, D. L.
5
U.S. Fish and Wildlife Service
5
United States. Army. Corps of Engineers
5
United States. Environmental Protection Agency
5
United States. Forest Service
5
United States. Forest Service. Eastern Region
4
Brown, R. G.
4
Fallon, James D.
4
Jacobs, H. D.
4
Minnesota. Department of Transportation
4
Myette, C. F.
4
Schoenberg, Michael
4
Winterstein, Thomas A.
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Language
Genre
Literary Form
Era
Region
Minnesota
21
Wisconsin
11
Voyageurs National Park (Minn.)
9
Mississippi River Watershed
8
Michigan
8
Minneapolis Metropolitan Area
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7
Mesabi Range
7
Voyageurs National Park
6
Chippewa National Forest (Minn.)
6
North Dakota
6
South Dakota
5
Chippewa National Forest
5
Iowa
5
Saint Paul Metropolitan Area
4
Saint Paul
3
Boundary Waters Canoe Area
3
Boundary Waters Canoe Area (Minn.)
3
California
3
North America
3
Prairie Island Indian Reservation
3
Ramsey County
3
Superior National Forest
3
Superior National Forest (Minn.)
3
United States
2
Aitkin County
2
Belgrade Region
2
Brooten Region
2
Cuyuna Range
2
Duluth
2
Kentucky
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Call Number
Year of Publication