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Institution
Collection
Format
Subject
2,939
Rules and practice
2,643
Geology
2,127
Appropriations and expenditures
1,513
Officials and employees
1,443
Water quality
1,320
Management
more ...
1,257
Auditing
1,207
Groundwater
1,105
Geology, Stratigraphic
997
Mines and mineral resources
919
United States Foreign relations
901
Evaluation
869
National security
736
Water-supply
715
Selection and appointment
685
Aquifers
665
Hydrogeology
663
Stream measurements
611
History
511
Automobiles Motors Exhaust gas
510
United States
502
Environmental monitoring
493
Streamflow
483
Paleontology
481
Groundwater flow
480
Forest management
474
Emergency management
464
Groundwater Quality
449
Hydrology
416
Water Pollution
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Author
14,916
Geological Survey (U.S.),
3,220
United States,
2,467
National Renewable Energy Laboratory (U.S.),
2,461
Law Library of Congress (U.S.). Global Legal Research Directorate,
1,265
National Center for Health Statistics (U.S.),
1,210
United States. Department of Health and Human Services. Office of Inspector General,
more ...
1,051
United States. Department of State,
978
United States. Congress. House. Committee on Natural Resources,
836
United States. Congress. Senate. Committee on Homeland Security and Governmental Affairs,
784
United States. Congress. Senate. Committee on Energy and Natural Resources,
762
Library of Congress. Law Library,
663
United States. Bureau of Labor Statistics,
610
United States. Congress. House. Committee on Rules,
582
United States. Congress. Senate. Committee on Commerce, Science, and Transportation,
572
United States. Congress. House. Committee on Financial Services,
557
United States. Environmental Protection Agency,
543
United States. National Park Service. Natural Resource Stewardship and Science,
542
United States. Congress. House. Committee on Foreign Affairs,
500
United States. Congress. House. Committee on Energy and Commerce,
499
United States. Congress. Senate. Committee on Environment and Public Works,
492
United States. Congress. House. Committee on the Judiciary,
492
United States. Department of the Interior. Office of Inspector General,
469
Geological Survey (U.S.)
448
United States. Forest Service,
442
Library of Congress. Far Eastern Law Division,
433
United States. Department of Agriculture. Economic Research Service,
423
United States. Department of Homeland Security. Office of Inspector General,
400
United States. Congress. House. Committee on Homeland Security,
390
United States. Congress. House. Committee on Transportation and Infrastructure,
379
United States. Congress. House. Committee on Oversight and Government Reform,
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Language
75,763
English
992
Spanish
109
French
66
Arabic
41
Chinese
37
Russian
more ...
34
Japanese
34
Portuguese
27
German
21
Korean
18
Tagalog
18
Vietnamese
16
Polish
15
Ukrainian
13
Haitian
12
Italian
10
Greek
9
Romanian
8
Dutch
8
Hungarian
7
Bulgarian
7
Kazakh
7
Turkish
6
Czech
6
Georgian
6
Latvian
5
Azerbaijani
5
Estonian
5
Mayan
4
Armenian
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Genre
11,300
Legislative hearings
7,085
Legislative materials
3,519
Technical reports
2,692
Statistics
1,939
Statutes and codes
1,221
Handbooks and manuals
more ...
1,174
Treaties
747
Conference papers and proceedings
549
Electronic government information
434
Bibliographies
231
Case studies
188
Vital statistics
185
Environmental impact statements
185
Maps
132
Biographies
118
Activity books
116
Census data
115
Trivia and miscellanea
86
Indexes
84
Surveys
82
Databases
66
Catalogs
64
Guidebooks
59
Literature
56
Personal correspondence
54
Dictionaries
51
Directories
47
Records (Documents)
42
Congresses
39
Tables (Data)
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Literary Form
Era
268
21st century
246
Cretaceous
228
20th century
155
Tertiary
140
1946-
137
2009-
more ...
95
Paleozoic
92
Eocene
84
Permian
84
Precambrian
76
Quaternary
75
Miocene
74
Cenozoic
66
Civil War, 2011-
63
Jurassic
63
Ordovician
62
Mississippian
61
Devonian
59
1991-
58
Pennsylvanian
57
Pleistocene
56
1970-
54
Mesozoic
51
2016
50
Triassic
47
1959-
41
2001-
40
1960-
40
Civil War, 1861-1865
37
19th century
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Region
39,893
United States
1,897
California
1,424
Alaska
990
Colorado
856
China
761
Arizona
more ...
749
Washington (State)
711
Florida
692
Oregon
644
Nevada
607
Texas
605
New York (State)
584
New Mexico
578
Montana
566
Wyoming
525
Utah
514
Idaho
475
Japan
422
Russia (Federation)
389
Washington (D.C.)
358
Pennsylvania
337
Mexico
337
Virginia
329
Hawaii
328
West (U.S.)
313
Afghanistan
297
Ohio
291
Georgia
287
Canada
281
Louisiana
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Call Number
15,831
K - Law
6,634
H - Social Science
6,616
E - United States History
5,380
A - General Works
4,993
L - Education
2,157
D - World History
more ...
1,919
S - Agriculture
1,500
J - Political Science
1,395
C - Historical Sciences
1,050
G - Geography, Anthropology, Recreation
862
N - Fine Arts
808
T - Technology
671
Q - Science
518
V - Naval Science
517
P - Language and Literature
284
F - General American History
236
U - Military Science
170
R - Medicine
30
Z - Library Science
5
B - Philosophy, Psychology, Religion
5
M - Music
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Year of Publication