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Collection
299,066
Electronic Access
144,548
Gov Pub Electronic
141,551
Main Books 3rd Floor
75,599
Gov Pub Microfiche
58,840
Storage Gov Pub
24,452
CO Gov Pub Electronic
more ...
12,206
Audio and Visual 1st Floor
8,122
Storage Books
7,423
Storage Folded Maps
6,902
Spec Coll 3rd Floor
6,126
Microfilm 2nd Floor
5,398
Juv Coll 2nd Floor
3,493
New Books 1st Floor
3,323
Ref Coll 1st Floor
2,028
Spec Coll Energy 3rd Floor
1,846
Storage Flat Maps
1,825
Flat Maps 2nd Floor
1,540
Oversize 3rd Floor
1,388
Reserve 1st Floor
1,298
Storage Periodicals
1,193
Storage Gov Pub Media
823
Gov Pub Ref 1st Floor
474
Storage Microfiche
421
Bestsellers 1st Floor
386
Periodicals
308
Storage Colo Doc
88
Microfiche 2nd Floor
66
Ref Oversize 1st Floor
57
Spec Coll Oversize 3rd Floor
56
Special Coll Rare Books
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Format
262,838
Book
259,791
eBook
146,377
Electronic
40,156
Microfilm
36,646
Video
18,759
Map
more ...
11,623
Unknown
7,857
Serial
6,402
CD
4,666
Text
4,386
Musical Score
4,245
Record
2,557
Journal
2,167
DVD
1,042
VHS
789
Audio
674
Photo
663
Software
265
Manuscript
259
Image
185
Slide
141
StillImage
115
Cassette
33
Still Image
24
Blu-ray Disc
19
Kit
19
Text; Still Image
17
Brochure
16
Sensor Image
13
Physical Object
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Subject
14,285
Geology
9,247
Appropriations and expenditures
6,643
Rules and practice
6,516
Management
5,264
United States Foreign relations
4,793
Mines and mineral resources
more ...
4,674
Groundwater
4,357
Geology, Stratigraphic
4,318
Water quality
4,315
History
4,245
Artificial intelligence
4,199
Officials and employees
4,082
Economics
3,468
Health
3,217
Business
3,114
Water-supply
2,980
United States Politics and government
2,896
Criticism and interpretation
2,816
United States History
2,700
National security
2,699
Computer security
2,696
Auditing
2,543
Evaluation
2,355
Mathematics
2,275
Operas
2,086
Entrepreneurship
2,041
United States
2,026
Selection and appointment
1,955
Computer science
1,814
Aquifers
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Author
73,532
SpringerLink (Online service)
39,580
ScienceDirect (Online service)
38,149
SpringerLink (Online Service)
30,633
Geological Survey (U.S.)
25,820
Infobase,
18,154
Geological Survey (U.S.),
more ...
15,222
Literature Online (Online Service)
12,704
Oxford Scholarship Online
11,841
Films for the Humanities & Sciences (Firm)
11,799
Infobase
10,462
Library of Congress. Congressional Research Service,
7,446
EBSCOhost
3,998
United States,
3,390
United States. Bureau of Mines
2,564
Educational Resources Information Center (U.S.)
2,515
National Renewable Energy Laboratory (U.S.),
2,462
Law Library of Congress (U.S.). Global Legal Research Directorate,
2,428
United States. Congress. House. Committee on Rules
2,336
U.S. Fish and Wildlife Service
2,205
United States. National Park Service
2,127
United States. Bureau of Land Management
2,123
Prendismo, LLC (Firm)
2,065
ProQuest (Firm)
2,024
United States. Congress. Senate. Committee on Energy and Natural Resources
1,825
United States. Forest Service
1,778
Colorado State University. Cooperative Extension Service
1,698
United States. Environmental Protection Agency
1,688
National Renewable Energy Laboratory (U.S.)
1,646
Public Broadcasting Service (U.S.)
1,529
United States. Bureau of the Census
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Language
789,489
English
8,933
Spanish
7,228
No linguistic content
5,672
German
5,537
French
4,996
eng
more ...
3,648
Italian
1,758
Russian
1,103
Undetermined
826
Latin
733
Chinese
564
Japanese
384
Portuguese
281
Ancient Greek
258
Multiple
235
Dutch
227
Arabic
221
Polish
185
Swedish
158
Greek
148
Hebrew
140
Czech
134
Korean
124
Norwegian
122
Hungarian
111
Danish
85
Vietnamese
47
Romanian
45
Turkish
43
Tagalog
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Genre
35,643
Conference papers and proceedings
32,938
Fiction
28,529
Sound recordings
26,040
Video recordings
23,489
Internet videos
21,741
Maps
more ...
16,948
Dictionaries
14,445
Periodicals
13,736
Legislative hearings
13,300
Biographies
12,959
Statistics
11,862
Handbooks and manuals
10,595
Bibliographies
9,081
Legislative materials
6,958
Technical reports
3,731
Congresses
3,658
Case studies
3,635
Scores
3,394
Topographic maps
3,066
Autobiographies
2,969
Operas
2,709
Drama
2,704
Statutes and codes
2,673
Instructional television programs
2,660
Excerpts
2,594
Treaties
2,447
Catalogs
2,212
Literature
1,818
Illustrated works
1,600
Academic theses
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Literary Form
Era
10,936
20th century
5,197
19th century
2,754
21st century
1,581
18th century
1,021
1564-1616
991
Civil War, 1861-1865
more ...
975
17th century
894
1945-
838
Cretaceous
751
1945-1989
592
16th century
554
1933-1945
518
Revolution, 1775-1783
496
1946-
485
1989-
447
Tertiary
441
To 1500
417
Quaternary
408
2009-
389
2001-2009
386
Early modern, 1500-1700
373
Colonial period, ca. 1600-1775
350
1991-
346
Precambrian
335
Paleozoic
294
Cenozoic
281
1960-
273
1951-
261
2000-
252
1929
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Region
186,847
United States
28,767
Colorado
8,658
California
7,157
Great Britain
5,282
China
5,252
Alaska
more ...
3,904
Europe
3,869
New Mexico
3,865
Utah
3,614
Arizona
3,359
Nevada
3,224
West (U.S.)
3,177
Texas
2,982
Wyoming
2,951
Montana
2,930
Oregon
2,852
Washington (State)
2,720
New York (State)
2,481
Florida
2,359
Idaho
2,341
Japan
2,258
India
2,129
Mexico
2,051
England
2,048
France
1,976
Germany
1,851
North America
1,755
Washington (D.C.)
1,700
Pennsylvania
1,651
Canada
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Call Number
93,797
Q - Science
64,371
H - Social Science
60,115
T - Technology
50,801
K - Law
43,341
P - Language and Literature
39,193
R - Medicine
more ...
36,456
E - United States History
31,890
L - Education
24,006
G - Geography, Anthropology, Recreation
18,617
D - World History
17,999
M - Music
16,690
A - General Works
15,910
B - Philosophy, Psychology, Religion
14,137
F - General American History
13,461
S - Agriculture
12,379
C - Historical Sciences
12,296
J - Political Science
10,366
N - Fine Arts
3,508
Z - Library Science
2,238
U - Military Science
1,953
V - Naval Science
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Year of Publication