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Institution
Collection
125,235
Gov Pub Electronic
65,034
Gov Pub Microfiche
56,167
Main Books 3rd Floor
47,569
Storage Gov Pub
33,263
Electronic Access
21,231
CO Gov Pub Electronic
more ...
6,543
Storage Folded Maps
4,514
Microfilm 2nd Floor
3,873
Spec Coll 3rd Floor
1,996
Audio and Visual 1st Floor
1,857
Storage Flat Maps
1,810
Juv Coll 2nd Floor
1,760
Flat Maps 2nd Floor
1,490
New Books 1st Floor
1,284
Ref Coll 1st Floor
1,222
Storage Books
1,104
Spec Coll Energy 3rd Floor
1,007
Storage Gov Pub Media
780
Gov Pub Ref 1st Floor
669
Oversize 3rd Floor
371
Storage Periodicals
281
Storage Colo Doc
253
Bestsellers 1st Floor
183
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
148,438
Book
91,564
eBook
57,102
Electronic
32,662
Microfilm
17,643
Map
10,491
Unknown
more ...
7,448
Video
6,601
Serial
1,246
DVD
1,147
Journal
526
Photo
410
Software
308
CD
302
VHS
275
Musical Score
188
Manuscript
179
Record
126
Audio
110
Slide
39
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
13,958
Geology
7,264
Appropriations and expenditures
5,266
United States Foreign relations
5,258
Rules and practice
4,624
Mines and mineral resources
4,532
Groundwater
more ...
4,231
Water quality
3,995
Geology, Stratigraphic
3,211
Management
3,014
History
2,978
United States Politics and government
2,912
Water-supply
2,807
United States History
2,650
National security
2,241
Evaluation
2,039
United States
2,029
Officials and employees
1,998
Auditing
1,792
Aquifers
1,745
United States Foreign economic relations
1,625
Stream measurements
1,588
Forest management
1,581
Hydrogeology
1,525
Emergency management
1,446
Hydrology
1,429
Water Pollution
1,409
United States Economic conditions
1,361
Budget
1,318
Paleontology
1,243
Groundwater Quality
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Author
28,156
Geological Survey (U.S.)
16,902
Geological Survey (U.S.),
10,025
SpringerLink (Online service)
9,556
Library of Congress. Congressional Research Service,
5,073
Oxford Scholarship Online
4,071
Infobase,
more ...
3,845
United States,
3,526
Films for the Humanities & Sciences (Firm)
3,515
Infobase
2,771
EBSCOhost
2,232
Educational Resources Information Center (U.S.)
2,185
U.S. Fish and Wildlife Service
2,155
United States. National Park Service
2,077
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
1,733
United States. Forest Service
1,599
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
1,387
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
1,281
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
372,852
English
4,109
Spanish
1,772
French
1,003
German
446
Russian
375
Chinese
more ...
327
Italian
283
No linguistic content
231
Japanese
206
Portuguese
156
Arabic
123
Undetermined
101
Latin
94
Multiple
92
Korean
89
Polish
82
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
25
Ukrainian
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Genre
20,504
Maps
12,682
Legislative hearings
12,267
Statistics
10,784
Periodicals
8,848
Biographies
8,181
Legislative materials
more ...
7,835
Bibliographies
5,570
Handbooks and manuals
4,854
Video recordings
4,114
Conference papers and proceedings
3,955
Technical reports
3,554
Internet videos
3,394
Topographic maps
2,585
Statutes and codes
2,501
Treaties
2,238
Autobiographies
2,018
Instructional television programs
1,986
Case studies
1,883
Fiction
1,578
Congresses
1,314
Catalogs
1,298
Guidebooks
1,272
Directories
1,129
Illustrated works
1,029
Drama
974
Databases
894
Literature
833
Dictionaries
760
Nonfiction television programs
722
Feature films
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Literary Form
Era
6,522
20th century
3,213
19th century
1,750
21st century
1,104
18th century
985
Civil War, 1861-1865
795
1945-
more ...
792
Cretaceous
650
1945-1989
643
17th century
539
1933-1945
516
Revolution, 1775-1783
435
1989-
432
16th century
430
Tertiary
410
2009-
401
1946-
389
2001-2009
363
Quaternary
350
1991-
347
Colonial period, ca. 1600-1775
325
To 1500
309
Paleozoic
304
Precambrian
279
Cenozoic
261
2000-
237
Permian
223
1960-
223
1993-2001
223
Eocene
219
1918-1945
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Region
187,182
United States
28,769
Colorado
8,660
California
7,102
Great Britain
5,283
China
5,254
Alaska
more ...
3,871
New Mexico
3,868
Utah
3,838
Europe
3,616
Arizona
3,361
Nevada
3,222
West (U.S.)
3,179
Texas
2,986
Wyoming
2,954
Montana
2,934
Oregon
2,854
Washington (State)
2,721
New York (State)
2,485
Florida
2,363
Idaho
2,339
Japan
2,256
India
2,127
Mexico
2,041
England
2,019
France
1,962
Germany
1,852
North America
1,756
Washington (D.C.)
1,703
Pennsylvania
1,652
Canada
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Call Number
45,593
K - Law
33,610
H - Social Science
28,079
E - United States History
21,777
L - Education
16,038
Q - Science
15,495
G - Geography, Anthropology, Recreation
more ...
14,357
D - World History
13,987
A - General Works
12,246
T - Technology
12,223
P - Language and Literature
12,050
F - General American History
8,448
J - Political Science
7,846
S - Agriculture
6,441
C - Historical Sciences
5,925
M - Music
3,870
N - Fine Arts
3,853
R - Medicine
2,375
B - Philosophy, Psychology, Religion
1,359
U - Military Science
1,263
Z - Library Science
1,225
V - Naval Science
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Year of Publication