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Collection
296,717
Electronic Access
145,433
Gov Pub Electronic
141,748
Main Books 3rd Floor
75,599
Gov Pub Microfiche
58,831
Storage Gov Pub
24,452
CO Gov Pub Electronic
more ...
12,188
Audio and Visual 1st Floor
8,120
Storage Books
7,422
Storage Folded Maps
6,911
Spec Coll 3rd Floor
6,126
Microfilm 2nd Floor
5,464
Juv Coll 2nd Floor
3,327
Ref Coll 1st Floor
2,261
New Books 1st Floor
2,028
Spec Coll Energy 3rd Floor
1,857
Storage Flat Maps
1,828
Flat Maps 2nd Floor
1,539
Oversize 3rd Floor
1,393
Reserve 1st Floor
1,298
Storage Periodicals
1,193
Storage Gov Pub Media
822
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
261,875
Book
260,944
eBook
143,343
Electronic
40,156
Microfilm
36,735
Video
18,778
Map
more ...
11,787
Unknown
7,975
Serial
6,685
CD
4,661
Text
4,384
Record
4,376
Musical Score
2,577
Journal
2,211
DVD
1,044
VHS
678
Photo
673
Software
350
Audio
265
Manuscript
259
Image
141
StillImage
133
Slide
131
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
14,288
Geology
9,295
Appropriations and expenditures
6,719
Rules and practice
6,537
Management
5,287
United States Foreign relations
4,811
Mines and mineral resources
more ...
4,675
Groundwater
4,358
Geology, Stratigraphic
4,328
History
4,318
Water quality
4,265
Artificial intelligence
4,221
Officials and employees
4,103
Economics
3,479
Health
3,218
Business
3,124
Water-supply
2,981
United States Politics and government
2,907
Criticism and interpretation
2,810
United States History
2,728
National security
2,724
Auditing
2,707
Computer security
2,600
Mathematics
2,562
Evaluation
2,279
Operas
2,087
Entrepreneurship
2,045
United States
2,034
Selection and appointment
2,031
Computer science
1,814
Aquifers
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Author
111,586
SpringerLink (Online service)
39,987
ScienceDirect (Online service)
30,767
Geological Survey (U.S.)
25,906
Infobase,
18,177
Geological Survey (U.S.),
15,222
Literature Online (Online Service)
more ...
13,007
Oxford Scholarship Online
11,837
Films for the Humanities & Sciences (Firm)
11,795
Infobase
10,614
Library of Congress. Congressional Research Service,
7,546
EBSCOhost
4,019
United States,
3,391
United States. Bureau of Mines
2,564
Educational Resources Information Center (U.S.)
2,517
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
2,338
U.S. Fish and Wildlife Service
2,204
United States. National Park Service
2,124
United States. Bureau of Land Management
2,123
Prendismo, LLC (Firm)
2,063
ProQuest (Firm)
2,024
United States. Congress. Senate. Committee on Energy and Natural Resources
1,824
United States. Forest Service
1,778
Colorado State University. Cooperative Extension Service
1,697
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
1,477
United States. Congress. House. Committee on the Judiciary
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Language
787,001
English
8,973
Spanish
7,219
No linguistic content
5,651
German
5,520
French
5,003
eng
more ...
3,646
Italian
1,751
Russian
1,128
Undetermined
826
Latin
732
Chinese
564
Japanese
385
Portuguese
281
Ancient Greek
254
Multiple
234
Dutch
229
Arabic
221
Polish
185
Swedish
158
Greek
148
Hebrew
140
Czech
134
Korean
123
Hungarian
123
Norwegian
111
Danish
85
Vietnamese
47
Romanian
45
Turkish
43
Persian
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Genre
35,751
Conference papers and proceedings
29,634
Fiction
28,454
Sound recordings
26,099
Video recordings
23,585
Internet videos
21,983
Maps
more ...
16,958
Dictionaries
14,574
Periodicals
13,890
Legislative hearings
13,285
Biographies
13,003
Statistics
11,928
Handbooks and manuals
10,749
Bibliographies
9,208
Legislative materials
7,000
Technical reports
3,751
Case studies
3,687
Congresses
3,630
Scores
3,401
Topographic maps
3,061
Autobiographies
2,970
Operas
2,748
Drama
2,719
Statutes and codes
2,673
Instructional television programs
2,656
Excerpts
2,603
Treaties
2,449
Catalogs
2,207
Literature
1,844
Illustrated works
1,600
Academic theses
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Literary Form
Era
10,909
20th century
5,200
19th century
2,780
21st century
1,582
18th century
1,019
1564-1616
987
Civil War, 1861-1865
more ...
978
17th century
885
1945-
838
Cretaceous
740
1945-1989
594
16th century
549
1933-1945
517
Revolution, 1775-1783
499
1946-
486
1989-
447
Tertiary
445
To 1500
417
Quaternary
410
2009-
389
2001-2009
388
Early modern, 1500-1700
373
Colonial period, ca. 1600-1775
351
1991-
346
Precambrian
335
Paleozoic
294
Cenozoic
280
1960-
273
1951-
261
2000-
251
1929
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Region
187,590
United States
28,785
Colorado
8,664
California
7,112
Great Britain
5,299
China
5,254
Alaska
more ...
3,873
New Mexico
3,869
Utah
3,844
Europe
3,617
Arizona
3,361
Nevada
3,224
West (U.S.)
3,180
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
2,339
Japan
2,262
India
2,131
Mexico
2,043
England
2,023
France
1,964
Germany
1,851
North America
1,759
Washington (D.C.)
1,703
Pennsylvania
1,657
Canada
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Call Number
93,702
Q - Science
64,532
H - Social Science
60,280
T - Technology
50,822
K - Law
43,267
P - Language and Literature
39,206
R - Medicine
more ...
36,496
E - United States History
32,054
L - Education
24,115
G - Geography, Anthropology, Recreation
18,147
D - World History
18,050
M - Music
16,565
A - General Works
15,964
B - Philosophy, Psychology, Religion
14,139
F - General American History
13,643
S - Agriculture
12,386
C - Historical Sciences
12,345
J - Political Science
10,375
N - Fine Arts
3,504
Z - Library Science
2,245
U - Military Science
1,971
V - Naval Science
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Year of Publication