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Institution
Collection
Format
Subject
1,270
Water quality
1,214
Geology
1,036
Groundwater
596
Water-supply
566
Mines and mineral resources
539
Geology, Stratigraphic
more ...
479
Hydrogeology
421
Aquifers
417
Stream measurements
367
Groundwater flow
348
Groundwater Pollution
335
Groundwater Quality
323
Water Pollution
310
Hydrology
262
Streamflow
206
Floods
134
Water table
130
Water resources development
124
Pesticides Environmental aspects
121
Nutrient pollution of water
119
Groundwater flow Mathematical models
114
Geology, Structural
114
Paleontology
109
Water quality management
105
Earthquakes
102
Geochemistry
92
Earth sciences
92
Geophysics
92
Water quality Measurement
85
Sediment transport
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Author
Geological Survey (U.S.)
310
National Water-Quality Assessment Program (U.S.)
149
United States. Environmental Protection Agency
128
United States. Department of Energy
115
United States. National Aeronautics and Space Administration
114
United States. Bureau of Reclamation
more ...
102
United States. National Park Service
99
United States. Bureau of Land Management
98
U.S. Atomic Energy Commission
71
United States. Army. Corps of Engineers
49
United States. Bureau of Indian Affairs
43
Southwest Florida Water Management District (Fla.)
42
United States. Department of Energy. Nevada Operations Office
42
Washington (State). Department of Ecology
41
Arkansas Soil and Water Conservation Commission
40
United States. Bureau of Mines
39
United States. National Oceanic and Atmospheric Administration
38
South Florida Water Management District (Fla.)
38
U.S. Fish and Wildlife Service
38
United States. Department of the Interior
38
United States. Forest Service
36
United States. Federal Highway Administration
35
New Jersey. Department of Environmental Protection
34
Planetary Geology and Geophysics Program (U.S.)
30
Rabbitt, Mary C.
29
Kansas. Department of Health and Environment
28
Wisconsin. Department of Natural Resources
27
Florida. Department of Environmental Regulation
27
Minnesota. Department of Natural Resources
27
Wyoming. State Engineer's Office
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Genre
989
Maps
121
Remote-sensing maps
118
Bibliographies
104
Periodicals
82
Abstracts
74
Conference papers and proceedings
more ...
68
Remote-sensing images
57
Statistics
49
Topographic maps
41
Technical reports
33
Bathymetric maps
29
Geological maps
26
Indexes
23
Databases
22
Congresses
21
Handbooks and manuals
21
Surveys
18
Catalogs
15
Geographic information systems
15
Nomenclature
14
Graphs
13
Gazetteers
11
Atlases
11
Government publications
11
Tables (Data)
10
Dictionaries
9
Charts, diagrams, etc
9
Directories
8
Drawings
8
Index maps
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Literary Form
Era
100
Cretaceous
65
Tertiary
40
Precambrian
39
Paleozoic
34
Miocene
33
Eocene
more ...
31
Permian
30
Cenozoic
30
Proterozoic
28
Quaternary
25
Jurassic
25
Mississippian
24
Ordovician
22
Devonian
21
Pleistocene
20
Triassic
19
Mesozoic
18
Pennsylvanian
16
Oligocene
12
Pliocene
12
Silurian
11
Cambrian
10
Archaean
10
Holocene
9
Pre-Quaternary
8
Paleocene
6
Neogene
4
Carboniferous
3
20th century
2
1834-1902
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Region
1,024
United States
508
California
493
Colorado
288
Nevada
272
Alaska
266
Florida
more ...
250
Utah
248
Arizona
245
Washington (State)
242
Wyoming
240
Montana
208
New Mexico
207
Texas
185
Oregon
168
New York (State)
163
Idaho
159
Massachusetts
155
Pennsylvania
154
Kansas
140
Wisconsin
132
Ohio
130
Minnesota
118
North Carolina
116
Missouri
106
New Jersey
106
Tennessee
102
Illinois
102
South Carolina
102
Virginia
98
South Dakota
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Call Number
2,857
Q - Science
2,068
G - Geography, Anthropology, Recreation
714
T - Technology
363
M - Music
14
S - Agriculture
12
F - General American History
more ...
12
H - Social Science
9
Z - Library Science
2
A - General Works
2
C - Historical Sciences
2
E - United States History
2
U - Military Science
1
D - World History
1
J - Political Science
1
K - Law
1
L - Education
1
R - Medicine
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Year of Publication