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Language: English
Collection
293,055
Electronic Access
142,048
Gov Pub Electronic
137,763
Main Books 3rd Floor
75,528
Gov Pub Microfiche
58,268
Storage Gov Pub
24,313
CO Gov Pub Electronic
more ...
8,074
Storage Books
7,419
Storage Folded Maps
5,529
Audio and Visual 1st Floor
5,387
Microfilm 2nd Floor
5,369
Juv Coll 2nd Floor
4,843
Spec Coll 3rd Floor
3,303
Ref Coll 1st Floor
3,173
New Books 1st Floor
2,025
Spec Coll Energy 3rd Floor
1,845
Storage Flat Maps
1,819
Flat Maps 2nd Floor
1,412
Oversize 3rd Floor
1,295
Storage Periodicals
1,072
Storage Gov Pub Media
822
Gov Pub Ref 1st Floor
474
Storage Microfiche
423
Reserve 1st Floor
420
Bestsellers 1st Floor
385
Periodicals
308
Storage Colo Doc
88
Microfiche 2nd Floor
66
Ref Oversize 1st Floor
56
Spec Coll Oversize 3rd Floor
55
Special Coll Rare Books
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Format
259,889
Book
257,111
eBook
142,704
Electronic
39,374
Microfilm
34,474
Video
18,738
Map
more ...
11,530
Unknown
7,683
Serial
4,665
Text
2,554
Journal
2,076
DVD
1,648
CD
1,571
Musical Score
1,021
VHS
744
Record
654
Software
647
Photo
387
Audio
263
Manuscript
181
Slide
139
StillImage
96
Cassette
21
Blu-ray Disc
19
Kit
19
Text; Still Image
17
Brochure
17
Still Image
16
Sensor Image
12
Physical Object
11
Newspaper
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Subject
14,216
Geology
9,227
Appropriations and expenditures
6,586
Rules and practice
6,487
Management
5,232
United States Foreign relations
4,780
Mines and mineral resources
more ...
4,667
Groundwater
4,348
Geology, Stratigraphic
4,311
Water quality
4,296
History
4,241
Artificial intelligence
4,188
Officials and employees
4,056
Economics
3,372
Health
3,194
Business
3,108
Water-supply
2,947
United States Politics and government
2,862
Criticism and interpretation
2,783
United States History
2,689
Computer security
2,683
Auditing
2,683
National security
2,534
Evaluation
2,081
Entrepreneurship
2,024
Selection and appointment
1,980
United States
1,954
Computer science
1,812
Aquifers
1,788
Computer networks
1,773
Emergency management
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Author
73,280
SpringerLink (Online service)
39,194
ScienceDirect (Online service)
37,623
SpringerLink (Online Service)
30,514
Geological Survey (U.S.)
23,913
Infobase,
18,125
Geological Survey (U.S.),
more ...
15,222
Literature Online (Online Service)
12,607
Oxford Scholarship Online
11,568
Films for the Humanities & Sciences (Firm)
11,527
Infobase
10,378
Library of Congress. Congressional Research Service,
7,444
EBSCOhost
3,988
United States,
3,384
United States. Bureau of Mines
2,564
Educational Resources Information Center (U.S.)
2,512
National Renewable Energy Laboratory (U.S.),
2,462
Law Library of Congress (U.S.). Global Legal Research Directorate,
2,427
United States. Congress. House. Committee on Rules
2,332
U.S. Fish and Wildlife Service
2,195
United States. National Park Service
2,128
United States. Bureau of Land Management
2,123
Prendismo, LLC (Firm)
2,023
United States. Congress. Senate. Committee on Energy and Natural Resources
1,980
ProQuest (Firm)
1,823
United States. Forest Service
1,777
Colorado State University. Cooperative Extension Service
1,685
National Renewable Energy Laboratory (U.S.)
1,665
United States. Environmental Protection Agency
1,631
Public Broadcasting Service (U.S.)
1,511
United States. Bureau of the Census
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Language
English
4,996
eng
4,046
French
3,800
German
3,161
Spanish
1,446
Russian
more ...
1,150
Italian
659
Chinese
531
Japanese
485
Latin
409
Undetermined
300
Portuguese
275
Ancient Greek
207
Dutch
203
Multiple
200
Arabic
195
Polish
167
No linguistic content
167
Swedish
144
Greek
134
Hebrew
116
Korean
114
Norwegian
113
Czech
110
Hungarian
102
Danish
43
Romanian
39
Turkish
35
Persian
35
Vietnamese
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Genre
35,541
Conference papers and proceedings
31,852
Fiction
24,137
Video recordings
21,892
Maps
21,578
Internet videos
19,606
Sound recordings
more ...
16,894
Dictionaries
14,162
Periodicals
13,649
Legislative hearings
13,234
Biographies
12,802
Statistics
11,591
Handbooks and manuals
10,534
Bibliographies
9,025
Legislative materials
6,908
Technical reports
3,726
Congresses
3,650
Case studies
3,327
Topographic maps
3,051
Autobiographies
2,702
Statutes and codes
2,673
Instructional television programs
2,588
Treaties
2,529
Drama
2,438
Catalogs
2,185
Literature
1,797
Illustrated works
1,594
Directories
1,539
Academic theses
1,471
Encyclopedias
1,449
Festschriften
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Literary Form
Era
10,751
20th century
4,722
19th century
2,672
21st century
1,496
18th century
1,015
1564-1616
989
Civil War, 1861-1865
more ...
942
17th century
881
1945-
837
Cretaceous
748
1945-1989
574
16th century
550
1933-1945
519
Revolution, 1775-1783
489
1946-
483
1989-
445
Tertiary
429
To 1500
417
Quaternary
408
2009-
389
2001-2009
384
Early modern, 1500-1700
371
Colonial period, ca. 1600-1775
349
1991-
346
Precambrian
334
Paleozoic
293
Cenozoic
277
1960-
270
1951-
259
2000-
250
Permian
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Region
184,397
United States
28,611
Colorado
8,564
California
7,145
Great Britain
5,229
China
5,210
Alaska
more ...
3,850
Utah
3,844
Europe
3,834
New Mexico
3,595
Arizona
3,351
Nevada
3,190
West (U.S.)
3,094
Texas
2,966
Wyoming
2,945
Montana
2,920
Oregon
2,848
Washington (State)
2,713
New York (State)
2,467
Florida
2,360
Idaho
2,326
Japan
2,252
India
2,016
England
1,957
Mexico
1,942
France
1,856
Germany
1,800
North America
1,743
Washington (D.C.)
1,697
Pennsylvania
1,628
Canada
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Call Number
93,375
Q - Science
63,027
H - Social Science
59,897
T - Technology
50,671
K - Law
41,512
P - Language and Literature
36,062
E - United States History
more ...
35,983
R - Medicine
31,603
L - Education
23,426
G - Geography, Anthropology, Recreation
18,403
D - World History
16,456
A - General Works
15,795
B - Philosophy, Psychology, Religion
13,221
F - General American History
12,835
S - Agriculture
12,186
J - Political Science
12,143
M - Music
10,309
N - Fine Arts
9,978
C - Historical Sciences
3,490
Z - Library Science
2,117
U - Military Science
1,856
V - Naval Science
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Year of Publication