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Institution
Collection
Format
Subject
1,859
Geology
858
Geology, Stratigraphic
679
Mines and mineral resources
358
Paleontology
254
Groundwater
177
Water quality
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142
Ore deposits
142
Petrology
129
Water-supply
118
Earthquakes
113
Uranium ores
111
California
111
Geochemistry
103
Hydrology
95
Water Pollution
85
Stream measurements
79
Alaska
79
Paleobotany
77
Geology, Structural
77
Volcanic ash, tuff, etc
72
Coal
69
Sedimentation and deposition
64
Igneous rocks
62
Geophysics
60
Earth sciences
60
Hydrogeological surveys
56
Floods
52
Arizona
52
Gold ores
51
Colorado
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Author
2,695
Geological Survey (U.S.)
177
U.S. Atomic Energy Commission
137
United States. National Bureau of Standards,
114
U.S. Fish and Wildlife Service
67
United States. National Aeronautics and Space Administration
54
United States. National Park Service
more ...
50
Smithsonian Institution. Press
47
Rocky Mountain Research Station (Fort Collins, Colo.)
46
United States. Bureau of Land Management
45
United States. Bureau of Mines
42
United States. National Bureau of Standards
37
Geological Survey (U.S.),
34
Marshall, R. B. 1867-1949
32
Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)
31
Kentucky Geological Survey
31
National Wetlands Research Center (U.S.)
29
National Water-Quality Assessment Program (U.S.)
28
National Science Foundation (U.S.)
28
United States. Department of Energy
26
United States. National Oceanic and Atmospheric Administration
24
Sims, P. K. 1918-2011
23
Smith, Philip S. 1877-1949
23
Stover, Carl W.
23
U.S. Fish and Wildlife Service. Region 1
23
United States. Bureau of Reclamation
22
Cobban, William A., 1916-2015
22
Imlay, Ralph W. 1908-1989
22
Moffit, Fred H. 1874-1958?
22
Rabbitt, Mary C.
19
Mertie, John Beaver, 1888-1980
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Language
Genre
141
Conference papers and proceedings
130
Bibliographies
115
Periodicals
95
Maps
85
Congresses
75
Technical reports
more ...
58
Abstracts
58
Handbooks and manuals
36
Statistics
26
Tables (Data)
19
Nomenclature
18
Classification
15
Catalogs
15
Guidebooks
14
Databases
14
Directories
13
Surveys
11
Illustrated works
11
Indexes
11
Serial publications
10
Dictionaries
10
Identification
9
Government publications
9
Literature
9
Topographic maps
8
Observations
7
Graphs
6
Geographic information systems
5
Geological maps
5
Photographs
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Literary Form
Era
185
Cretaceous
108
Tertiary
78
Precambrian
69
Eocene
68
Cenozoic
67
Permian
more ...
65
Miocene
63
Paleozoic
50
Mississippian
48
Pennsylvanian
46
Jurassic
45
Mesozoic
45
Ordovician
45
Quaternary
43
Devonian
40
Pleistocene
40
Triassic
36
Proterozoic
32
Oligocene
25
Cambrian
24
Pliocene
22
Silurian
20
Paleocene
19
Carboniferous
15
Holocene
12
Archaean
9
Neogene
3
1834-1902
3
19th century
3
Paleogene
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Region
901
United States
492
Alaska
451
California
370
Colorado
264
Nevada
242
Utah
more ...
224
Wyoming
223
Arizona
214
Montana
179
Idaho
156
New Mexico
146
Oregon
141
Washington (State)
75
Texas
74
New York (State)
72
West (U.S.)
70
Kentucky
70
Pennsylvania
69
Virginia
66
Florida
64
Hawaii
61
North America
61
South Dakota
60
Michigan
55
Kansas
51
Wisconsin
46
North Carolina
46
Tennessee
44
Arkansas
40
Ohio
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Call Number
Year of Publication