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Institution
Collection
125,653
Gov Pub Electronic
65,034
Gov Pub Microfiche
56,797
Main Books 3rd Floor
47,569
Storage Gov Pub
33,754
Electronic Access
21,231
CO Gov Pub Electronic
more ...
6,543
Storage Folded Maps
4,514
Microfilm 2nd Floor
3,887
Spec Coll 3rd Floor
1,991
Audio and Visual 1st Floor
1,857
Storage Flat Maps
1,812
Juv Coll 2nd Floor
1,760
Flat Maps 2nd Floor
1,284
Ref Coll 1st Floor
1,222
Storage Books
1,104
Spec Coll Energy 3rd Floor
1,007
Storage Gov Pub Media
878
New Books 1st Floor
780
Gov Pub Ref 1st Floor
669
Oversize 3rd Floor
371
Storage Periodicals
281
Storage Colo Doc
254
Bestsellers 1st Floor
189
Reserve 1st Floor
127
Storage Microfiche
108
Periodicals
46
Spec Coll Oversize 3rd Floor
34
Ref Oversize 1st Floor
33
Map CD 2nd Floor
28
Special Coll Rare Books
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Format
148,475
Book
92,276
eBook
57,111
Electronic
32,662
Microfilm
17,641
Map
10,589
Unknown
more ...
7,474
Video
6,649
Serial
1,276
DVD
1,160
Journal
526
Photo
407
Software
316
CD
302
VHS
275
Musical Score
191
Record
188
Manuscript
101
Audio
83
Slide
42
Cassette
16
Sensor Image
12
Blu-ray Disc
9
Kit
8
Book Chapter
6
Newspaper
2
Braille
1
Physical Object
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Subject
13,961
Geology
7,288
Appropriations and expenditures
5,290
United States Foreign relations
5,289
Rules and practice
4,627
Mines and mineral resources
4,532
Groundwater
more ...
4,231
Water quality
3,998
Geology, Stratigraphic
3,218
Management
3,026
History
2,983
United States Politics and government
2,924
Water-supply
2,816
United States History
2,669
National security
2,246
Evaluation
2,044
United States
2,035
Officials and employees
2,005
Auditing
1,792
Aquifers
1,752
United States Foreign economic relations
1,638
Stream measurements
1,591
Forest management
1,581
Hydrogeology
1,530
Emergency management
1,446
Hydrology
1,429
Water Pollution
1,411
United States Economic conditions
1,364
Budget
1,320
Paleontology
1,243
Groundwater Quality
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Author
28,156
Geological Survey (U.S.)
16,904
Geological Survey (U.S.),
10,025
SpringerLink (Online service)
9,651
Library of Congress. Congressional Research Service,
5,106
Oxford Scholarship Online
4,096
Infobase,
more ...
3,858
United States,
3,526
Films for the Humanities & Sciences (Firm)
3,515
Infobase
2,773
EBSCOhost
2,232
Educational Resources Information Center (U.S.)
2,185
U.S. Fish and Wildlife Service
2,155
United States. National Park Service
2,064
United States. Bureau of Land Management
1,985
United States. Congress. House. Committee on Rules
1,976
Law Library of Congress (U.S.). Global Legal Research Directorate,
1,850
United States. Congress. Senate. Committee on Energy and Natural Resources
1,721
United States. Forest Service
1,598
ScienceDirect (Online service)
1,551
National Renewable Energy Laboratory (U.S.),
1,481
United States. Bureau of the Census
1,456
Colorado. General Assembly. Legislative Council
1,388
United States. Congress. House. Committee on the Judiciary
1,382
National Center for Education Statistics
1,340
United States. Environmental Protection Agency
1,330
United States. Bureau of Mines
1,296
United States. Forest Service,
1,276
National Center for Health Statistics (U.S.),
1,259
United States. Congress. House. Committee on Natural Resources,
1,203
United States. Congress. Senate. Committee on Foreign Relations
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Language
373,793
English
4,112
Spanish
1,773
French
1,006
German
447
Russian
384
Chinese
more ...
329
Italian
282
No linguistic content
233
Japanese
206
Portuguese
158
Arabic
124
Undetermined
102
Latin
94
Multiple
92
Korean
89
Polish
83
Dutch
71
Vietnamese
67
Hebrew
55
Swedish
50
Ancient Greek
47
Greek
42
Norwegian
40
Hungarian
40
Tagalog
35
Danish
33
Haitian
30
Czech
26
Turkish
26
Ukrainian
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Genre
20,717
Maps
12,750
Legislative hearings
12,291
Statistics
10,890
Periodicals
8,868
Biographies
8,244
Legislative materials
more ...
7,923
Bibliographies
5,575
Handbooks and manuals
4,902
Video recordings
4,136
Conference papers and proceedings
3,963
Technical reports
3,582
Internet videos
3,394
Topographic maps
2,591
Statutes and codes
2,507
Treaties
2,242
Autobiographies
2,018
Instructional television programs
1,998
Case studies
1,902
Fiction
1,578
Congresses
1,314
Catalogs
1,300
Guidebooks
1,272
Directories
1,132
Illustrated works
1,070
Drama
979
Databases
894
Literature
834
Dictionaries
760
Nonfiction television programs
723
Feature films
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Literary Form
Era
6,552
20th century
3,229
19th century
1,771
21st century
1,111
18th century
985
Civil War, 1861-1865
795
1945-
more ...
792
Cretaceous
650
1945-1989
649
17th century
539
1933-1945
516
Revolution, 1775-1783
436
1989-
433
16th century
430
Tertiary
410
2009-
403
1946-
389
2001-2009
363
Quaternary
352
1991-
347
Colonial period, ca. 1600-1775
329
To 1500
309
Paleozoic
304
Precambrian
280
Cenozoic
267
2000-
237
Permian
223
1960-
223
1993-2001
223
Eocene
219
1918-1945
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Region
187,620
United States
28,785
Colorado
8,664
California
7,125
Great Britain
5,353
China
5,254
Alaska
more ...
3,873
New Mexico
3,869
Utah
3,856
Europe
3,617
Arizona
3,361
Nevada
3,224
West (U.S.)
3,181
Texas
2,988
Wyoming
2,953
Montana
2,935
Oregon
2,857
Washington (State)
2,722
New York (State)
2,485
Florida
2,364
Idaho
2,356
Japan
2,298
India
2,133
Mexico
2,050
England
2,026
France
1,969
Germany
1,852
North America
1,759
Washington (D.C.)
1,704
Pennsylvania
1,658
Canada
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Call Number
45,601
K - Law
33,785
H - Social Science
28,102
E - United States History
21,906
L - Education
16,094
Q - Science
15,529
G - Geography, Anthropology, Recreation
more ...
14,391
D - World History
14,057
A - General Works
12,289
T - Technology
12,255
P - Language and Literature
12,061
F - General American History
8,489
J - Political Science
7,866
S - Agriculture
6,441
C - Historical Sciences
5,938
M - Music
3,884
N - Fine Arts
3,876
R - Medicine
2,390
B - Philosophy, Psychology, Religion
1,361
U - Military Science
1,266
Z - Library Science
1,241
V - Naval Science
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Year of Publication