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Language: English
Collection
295,960
Electronic Access
143,475
Gov Pub Electronic
137,931
Main Books 3rd Floor
75,528
Gov Pub Microfiche
58,262
Storage Gov Pub
24,313
CO Gov Pub Electronic
more ...
8,115
Storage Books
7,418
Storage Folded Maps
5,510
Audio and Visual 1st Floor
5,445
Juv Coll 2nd Floor
5,387
Microfilm 2nd Floor
4,858
Spec Coll 3rd Floor
3,310
Ref Coll 1st Floor
2,260
New Books 1st Floor
2,025
Spec Coll Energy 3rd Floor
1,856
Storage Flat Maps
1,822
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
434
Reserve 1st Floor
421
Bestsellers 1st Floor
386
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
263,121
eBook
259,261
Book
140,421
Electronic
39,375
Microfilm
34,623
Video
18,764
Map
more ...
11,777
Unknown
7,845
Serial
4,660
Text
2,572
Journal
2,152
DVD
1,719
CD
1,570
Musical Score
1,021
VHS
793
Record
661
Software
653
Photo
265
Manuscript
258
Audio
139
StillImage
105
Cassette
104
Slide
21
Blu-ray Disc
19
Kit
19
Text; Still Image
17
Brochure
17
Still Image
16
Sensor Image
12
Physical Object
12
Text; StillImage
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Subject
14,278
Geology
9,293
Appropriations and expenditures
6,693
Rules and practice
6,539
Management
5,274
United States Foreign relations
4,807
Mines and mineral resources
more ...
4,673
Groundwater
4,515
Artificial intelligence
4,356
Geology, Stratigraphic
4,322
History
4,316
Water quality
4,219
Officials and employees
4,084
Economics
3,393
Health
3,200
Business
3,124
Water-supply
2,958
United States Politics and government
2,884
Criticism and interpretation
2,785
Computer security
2,784
United States History
2,728
National security
2,724
Auditing
2,561
Evaluation
2,112
Entrepreneurship
2,096
Computer science
2,034
Selection and appointment
1,983
United States
1,911
Mathematics
1,876
Computer networks
1,813
Aquifers
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Author
110,852
SpringerLink (Online service)
39,594
ScienceDirect (Online service)
30,737
Geological Survey (U.S.)
24,061
Infobase,
18,173
Geological Survey (U.S.),
15,222
Literature Online (Online Service)
more ...
13,006
Oxford Scholarship Online
11,564
Films for the Humanities & Sciences (Firm)
11,523
Infobase
10,614
Library of Congress. Congressional Research Service,
7,546
EBSCOhost
4,256
SpringerLink (Online Service)
4,018
United States,
3,387
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,
2,427
United States. Congress. House. Committee on Rules
2,333
U.S. Fish and Wildlife Service
2,194
United States. National Park Service
2,123
Prendismo, LLC (Firm)
2,122
United States. Bureau of Land Management
2,023
United States. Congress. Senate. Committee on Energy and Natural Resources
1,978
ProQuest (Firm)
1,817
United States. Forest Service
1,777
Colorado State University. Cooperative Extension Service
1,686
National Renewable Energy Laboratory (U.S.)
1,663
United States. Environmental Protection Agency
1,630
Public Broadcasting Service (U.S.)
1,511
United States. Bureau of the Census
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Language
English
5,003
eng
4,037
French
3,837
German
3,166
Spanish
1,447
Russian
more ...
1,157
Italian
680
Chinese
536
Japanese
485
Latin
409
Undetermined
303
Portuguese
278
Ancient Greek
207
Dutch
203
Arabic
199
Multiple
196
Polish
168
No linguistic content
166
Swedish
145
Greek
135
Hebrew
115
Korean
115
Norwegian
113
Czech
110
Hungarian
103
Danish
43
Romanian
40
Turkish
36
Persian
35
Vietnamese
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Genre
36,113
Conference papers and proceedings
28,577
Fiction
24,166
Video recordings
21,956
Maps
21,738
Internet videos
19,555
Sound recordings
more ...
16,905
Dictionaries
14,332
Periodicals
13,890
Legislative hearings
13,235
Biographies
12,872
Statistics
11,688
Handbooks and manuals
10,739
Bibliographies
9,208
Legislative materials
6,995
Technical reports
3,749
Case studies
3,680
Congresses
3,401
Topographic maps
3,055
Autobiographies
2,719
Statutes and codes
2,673
Instructional television programs
2,601
Treaties
2,540
Drama
2,440
Catalogs
2,182
Literature
1,833
Illustrated works
1,594
Directories
1,541
Academic theses
1,518
Picture books
1,472
Encyclopedias
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Literary Form
Era
10,787
20th century
4,750
19th century
2,747
21st century
1,504
18th century
1,019
1564-1616
985
Civil War, 1861-1865
more ...
952
17th century
875
1945-
837
Cretaceous
740
1945-1989
577
16th century
546
1933-1945
517
Revolution, 1775-1783
498
1946-
485
1989-
445
Tertiary
433
To 1500
417
Quaternary
410
2009-
389
2001-2009
387
Early modern, 1500-1700
372
Colonial period, ca. 1600-1775
352
1991-
346
Precambrian
335
Paleozoic
295
Cenozoic
278
1960-
270
1951-
265
2000-
250
Permian
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Region
185,642
United States
28,641
Colorado
8,581
California
7,116
Great Britain
5,319
China
5,220
Alaska
more ...
3,867
Utah
3,840
New Mexico
3,801
Europe
3,612
Arizona
3,356
Nevada
3,198
West (U.S.)
3,103
Texas
2,986
Wyoming
2,953
Montana
2,927
Oregon
2,855
Washington (State)
2,719
New York (State)
2,473
Florida
2,364
Idaho
2,346
Japan
2,292
India
2,018
England
1,964
Mexico
1,924
France
1,849
Germany
1,809
North America
1,749
Washington (D.C.)
1,703
Pennsylvania
1,640
Canada
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Call Number
94,831
Q - Science
63,846
H - Social Science
61,480
T - Technology
50,737
K - Law
41,591
P - Language and Literature
36,556
R - Medicine
more ...
36,159
E - United States History
32,028
L - Education
24,142
G - Geography, Anthropology, Recreation
17,973
D - World History
16,387
A - General Works
15,939
B - Philosophy, Psychology, Religion
13,232
F - General American History
13,131
S - Agriculture
12,284
J - Political Science
12,092
M - Music
10,361
N - Fine Arts
10,012
C - Historical Sciences
3,511
Z - Library Science
2,129
U - Military Science
1,887
V - Naval Science
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Year of Publication