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Institution
Format
Subject
327
Geology
105
Groundwater
80
Geology, Stratigraphic
62
Geomagnetism
52
Aquifers
37
Magnetic anomalies
more ...
36
Powder River Basin (Wyo. and Mont.)
35
Petrology
33
Water table
31
Water quality
28
Formations (Geology)
28
Geology, Structural
23
Gravity anomalies
20
Mines and mineral resources
17
Borings
16
Gas industry
15
Groundwater Quality
13
Landslides
11
Faults (Geology)
11
Sediments (Geology)
10
Natural gas Prospecting
10
Petroleum Prospecting
10
Petroleum industry and trade
9
Sandstone
8
Black Hills (S.D. and Wyo.)
8
Digital mapping
8
Earthquakes
8
Oil well logging, Electric
8
Patapsco Aquifer
8
Petroleum Geology
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Author
827
Geological Survey (U.S.)
43
Fox, J. E. 1943-
33
Higley, Debra K.
23
Billingsley, George H.
22
Colton, Roger B. 1924-
22
Maryland Geological Survey
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21
Montana Bureau of Mines and Geology
18
McGraw, J. P.
17
Mast, Richard F. 1931-
15
Airmag Surveys, Inc
15
Mack, Frederick K.
15
Maryland. Tidewater Administration
14
High-Sense Geophysics Limited
14
Welch, Alan H.
14
Williams, Rhea P.
12
Jachens, Robert C.
11
Durst, S. L.
11
Southwest Florida Water Management District (Fla.)
10
St. Johns River Water Management District (Fla.)
9
Andreasen, David C.
9
Curtin, Stephen E.
9
Kane, Richard L.
9
Langenheim, Victoria E.
8
Brabb, Earl E., 1929-
8
DeWitt, Ed
8
Fairer, G. M.
8
Hill, Patricia L.
8
Morton, Douglas M.
8
Nevada Bureau of Mines and Geology
8
Pearson, DeRidder, & Johnson, Inc
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Language
Genre
Maps
26
Drawings
12
Databases
11
Topographic maps
8
Bibliographies
5
Remote-sensing maps
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2
Bathymetric maps
2
Geological maps
2
Quadrangle maps
1
Conference papers and proceedings
1
Geographic information systems
1
Geological cross-sections
1
Index maps
1
Periodicals
1
Physical maps
1
Serial publications
1
Software
1
Technical reports
1
World maps
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Literary Form
Era
Region
121
California
77
Nevada
55
Alaska
51
Arizona
42
Florida
41
Powder River Basin (Wyo. and Mont.)
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34
Montana
33
Mohave County
31
Utah
29
Colorado
27
Washington (State)
23
Wisconsin
22
San Bernardino County
20
New Mexico
16
Lincoln County
16
United States
15
Idaho
15
Maryland, Southern
15
Oregon
15
Virginia
12
Wyoming
11
California, Southern
11
Riverside County
10
McCone County
10
Palm Beach County
9
Clark County
9
Hawaii
9
Minnesota
9
Saudi Arabia
9
Vermont
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Year of Publication