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Collection
260,790
Electronic Access
141,440
Main Books 3rd Floor
135,667
Gov Pub Electronic
73,834
Gov Pub Microfiche
69,974
Storage Gov Pub
23,631
CO Gov Pub Electronic
more ...
12,274
Audio and Visual 1st Floor
7,822
Storage Books
7,411
Storage Folded Maps
6,695
Spec Coll 3rd Floor
6,126
Microfilm 2nd Floor
5,220
Juv Coll 2nd Floor
3,296
Ref Coll 1st Floor
2,997
New Books 1st Floor
2,030
Spec Coll Energy 3rd Floor
1,666
Flat Maps 2nd Floor
1,522
Oversize 3rd Floor
1,402
Storage Flat Maps
1,300
Storage Periodicals
1,233
Reserve 1st Floor
1,193
Storage Gov Pub Media
883
Gov Pub Ref 1st Floor
474
Storage Microfiche
387
Periodicals
328
Bestsellers 1st Floor
306
Storage Colo Doc
88
Microfiche 2nd Floor
65
Ref Oversize 1st Floor
63
Spec Coll Oversize 3rd Floor
51
Storage Oversize
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Format
267,017
Book
229,913
eBook
130,291
Electronic
39,479
Microfilm
36,789
Video
22,843
Map
more ...
9,326
Unknown
7,552
Serial
6,365
CD
4,467
Text
4,343
Musical Score
4,216
Record
2,535
Journal
2,150
DVD
1,017
VHS
805
Audio
695
Photo
657
Software
433
StillImage
259
Manuscript
220
Other
201
Cassette
191
Slide
26
Presentation
24
Blu-ray Disc
18
Brochure
18
Kit
17
Sensor Image
14
Physical Object
10
Book Chapter
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Subject
14,311
Geology
9,011
Appropriations and expenditures
6,119
Rules and practice
6,004
Management
5,187
United States Foreign relations
4,778
Mines and mineral resources
more ...
4,585
Groundwater
4,364
Geology, Stratigraphic
4,220
Water quality
4,101
History
3,949
Economics
3,940
Officials and employees
3,159
Business
3,065
Water-supply
3,023
Health
2,940
United States Politics and government
2,906
Artificial intelligence
2,755
United States History
2,726
Criticism and interpretation
2,520
National security
2,516
Auditing
2,352
Evaluation
2,295
Computer security
2,251
Operas
2,066
United States
1,985
Mathematics
1,939
Entrepreneurship
1,916
Selection and appointment
1,838
Computer science
1,773
Aquifers
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Author
95,961
SpringerLink (Online service)
37,842
ScienceDirect (Online service)
34,587
Geological Survey (U.S.)
25,695
Infobase,
17,638
Geological Survey (U.S.),
15,263
Literature Online (Online Service)
more ...
12,430
Films for the Humanities & Sciences (Firm)
12,390
Infobase
11,201
Oxford Scholarship Online
8,228
Library of Congress. Congressional Research Service,
7,306
EBSCOhost
3,736
United States,
3,381
United States. Bureau of Mines
2,935
United States. Department of State
2,571
United States. Congress. House. Committee on Rules
2,560
Educational Resources Information Center (U.S.)
2,336
National Renewable Energy Laboratory (U.S.),
2,329
U.S. Fish and Wildlife Service
2,222
United States. National Park Service
2,145
United States. Bureau of Land Management
2,123
Prendismo, LLC (Firm)
2,050
United States. Congress. Senate. Committee on Energy and Natural Resources
1,871
United States. Forest Service
1,774
Colorado State University. Cooperative Extension Service
1,685
National Renewable Energy Laboratory (U.S.)
1,682
Law Library of Congress (U.S.). Global Legal Research Directorate,
1,676
United States. Environmental Protection Agency
1,669
ProQuest (Firm)
1,585
United States. Bureau of the Census
1,542
United States. Congress. Senate. Committee on Foreign Relations
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Language
750,215
English
8,024
Spanish
7,210
No linguistic content
5,543
French
5,194
German
5,009
eng
more ...
3,613
Italian
1,796
Russian
822
Latin
794
Undetermined
630
Chinese
543
Japanese
381
Portuguese
272
Ancient Greek
254
Multiple
241
Dutch
238
Arabic
229
Polish
183
Swedish
167
Greek
148
Czech
139
Hebrew
139
Korean
125
Hungarian
115
Norwegian
114
Danish
85
Vietnamese
47
Romanian
43
Finnish
43
Middle English
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Genre
31,609
Conference papers and proceedings
25,953
Maps
25,887
Video recordings
25,777
Fiction
22,924
Internet videos
22,157
Sound recordings
more ...
16,955
Dictionaries
14,306
Periodicals
12,989
Biographies
12,796
Statistics
12,359
Legislative hearings
11,500
Handbooks and manuals
9,305
Bibliographies
8,135
Legislative materials
6,924
Topographic maps
6,782
Technical reports
3,785
Congresses
3,606
Scores
3,391
Case studies
2,979
Autobiographies
2,960
Operas
2,673
Instructional television programs
2,649
Drama
2,638
Excerpts
2,613
Statutes and codes
2,542
Treaties
2,438
Catalogs
2,211
Literature
1,724
Illustrated works
1,591
Directories
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Literary Form
Era
10,297
20th century
4,969
19th century
2,430
21st century
1,497
18th century
1,000
1564-1616
986
Civil War, 1861-1865
more ...
907
17th century
856
1945-
841
Cretaceous
738
1945-1989
559
16th century
541
1933-1945
521
Revolution, 1775-1783
471
1989-
449
1946-
448
Tertiary
422
Quaternary
393
2009-
382
Early modern, 1500-1700
381
To 1500
380
2001-2009
362
Colonial period, ca. 1600-1775
348
Precambrian
336
Paleozoic
319
1991-
298
Cenozoic
271
1951-
264
1960-
249
Permian
243
1929
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Region
183,661
United States
27,925
Colorado
8,794
California
6,780
Great Britain
5,325
Alaska
4,759
China
more ...
3,978
Utah
3,833
New Mexico
3,722
Europe
3,601
Arizona
3,463
Texas
3,427
Nevada
3,164
West (U.S.)
3,032
Wyoming
3,016
Montana
2,997
Oregon
2,997
Washington (State)
2,735
Florida
2,710
New York (State)
2,505
Idaho
2,143
Japan
2,108
Mexico
2,022
India
1,989
England
1,935
France
1,830
North America
1,822
Pennsylvania
1,777
Germany
1,768
Washington (D.C.)
1,627
Canada
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Call Number
87,788
Q - Science
61,453
H - Social Science
55,396
T - Technology
49,717
K - Law
41,894
P - Language and Literature
36,038
R - Medicine
more ...
35,765
E - United States History
27,709
L - Education
22,841
G - Geography, Anthropology, Recreation
18,159
M - Music
17,991
D - World History
16,381
A - General Works
15,000
B - Philosophy, Psychology, Religion
14,339
S - Agriculture
14,015
F - General American History
12,851
C - Historical Sciences
11,662
J - Political Science
10,093
N - Fine Arts
3,395
Z - Library Science
2,091
U - Military Science
1,972
V - Naval Science
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Year of Publication