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Collection
297,066
Electronic Access
143,532
Gov Pub Electronic
141,531
Main Books 3rd Floor
75,599
Gov Pub Microfiche
58,823
Storage Gov Pub
24,403
CO Gov Pub Electronic
more ...
12,201
Audio and Visual 1st Floor
8,061
Storage Books
7,416
Storage Folded Maps
6,899
Spec Coll 3rd Floor
6,126
Microfilm 2nd Floor
5,386
Juv Coll 2nd Floor
3,315
Ref Coll 1st Floor
2,987
New Books 1st Floor
2,028
Spec Coll Energy 3rd Floor
1,960
Storage Flat Maps
1,708
Flat Maps 2nd Floor
1,539
Oversize 3rd Floor
1,377
Reserve 1st Floor
1,298
Storage Periodicals
1,193
Storage Gov Pub Media
822
Gov Pub Ref 1st Floor
474
Storage Microfiche
420
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
262,222
Book
257,770
eBook
145,748
Electronic
40,156
Microfilm
36,466
Video
18,743
Map
more ...
11,466
Unknown
7,779
Serial
6,403
CD
4,666
Text
4,385
Musical Score
4,242
Record
2,557
Journal
2,164
DVD
1,042
VHS
788
Audio
672
Photo
664
Software
263
Manuscript
259
Image
184
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
14,216
Geology
9,212
Appropriations and expenditures
6,576
Rules and practice
6,458
Management
5,230
United States Foreign relations
4,780
Mines and mineral resources
more ...
4,669
Groundwater
4,351
Geology, Stratigraphic
4,307
Water quality
4,272
History
4,171
Officials and employees
4,089
Artificial intelligence
4,008
Economics
3,387
Health
3,212
Business
3,100
Water-supply
2,965
United States Politics and government
2,880
Criticism and interpretation
2,808
United States History
2,678
Auditing
2,673
National security
2,668
Computer security
2,529
Evaluation
2,273
Operas
2,113
Mathematics
2,077
Entrepreneurship
2,040
United States
2,019
Selection and appointment
1,860
Computer science
1,813
Aquifers
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Author
69,856
SpringerLink (Online Service)
41,634
SpringerLink (Online service)
39,641
ScienceDirect (Online service)
30,538
Geological Survey (U.S.)
25,644
Infobase,
18,125
Geological Survey (U.S.),
more ...
15,222
Literature Online (Online Service)
12,607
Oxford Scholarship Online
11,840
Films for the Humanities & Sciences (Firm)
11,798
Infobase
10,310
Library of Congress. Congressional Research Service,
7,447
EBSCOhost
3,972
United States,
3,388
United States. Bureau of Mines
2,564
Educational Resources Information Center (U.S.)
2,507
National Renewable Energy Laboratory (U.S.),
2,458
Law Library of Congress (U.S.). Global Legal Research Directorate,
2,428
United States. Congress. House. Committee on Rules
2,337
U.S. Fish and Wildlife Service
2,205
United States. National Park Service
2,130
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
1,830
United States. Forest Service
1,778
Colorado State University. Cooperative Extension Service
1,697
United States. Environmental Protection Agency
1,687
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
785,962
English
8,783
Spanish
7,226
No linguistic content
5,653
German
5,525
French
4,996
eng
more ...
3,642
Italian
1,749
Russian
1,079
Undetermined
825
Latin
722
Chinese
562
Japanese
384
Portuguese
276
Ancient Greek
258
Multiple
233
Dutch
226
Arabic
221
Polish
184
Swedish
157
Greek
145
Hebrew
140
Czech
135
Korean
122
Norwegian
121
Hungarian
111
Danish
85
Vietnamese
47
Romanian
43
Tagalog
43
Turkish
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Genre
34,924
Conference papers and proceedings
32,903
Fiction
28,537
Sound recordings
25,949
Video recordings
23,310
Internet videos
21,870
Maps
more ...
16,942
Dictionaries
14,374
Periodicals
13,575
Legislative hearings
13,259
Biographies
12,916
Statistics
11,771
Handbooks and manuals
10,454
Bibliographies
8,957
Legislative materials
6,904
Technical reports
3,732
Congresses
3,635
Scores
3,545
Case studies
3,326
Topographic maps
3,054
Autobiographies
2,970
Operas
2,752
Drama
2,695
Statutes and codes
2,673
Instructional television programs
2,659
Excerpts
2,580
Treaties
2,445
Catalogs
2,208
Literature
1,799
Illustrated works
1,597
Directories
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Literary Form
Era
10,870
20th century
5,171
19th century
2,702
21st century
1,578
18th century
1,014
1564-1616
989
Civil War, 1861-1865
more ...
969
17th century
889
1945-
838
Cretaceous
748
1945-1989
588
16th century
553
1933-1945
519
Revolution, 1775-1783
488
1946-
484
1989-
447
Tertiary
435
To 1500
417
Quaternary
408
2009-
387
2001-2009
385
Early modern, 1500-1700
372
Colonial period, ca. 1600-1775
347
1991-
346
Precambrian
334
Paleozoic
293
Cenozoic
278
1960-
273
1951-
260
2000-
252
1929
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Region
185,918
United States
28,705
Colorado
8,640
California
7,140
Great Britain
5,248
China
5,241
Alaska
more ...
3,879
Europe
3,860
New Mexico
3,848
Utah
3,599
Arizona
3,354
Nevada
3,213
West (U.S.)
3,171
Texas
2,965
Wyoming
2,945
Montana
2,927
Oregon
2,848
Washington (State)
2,713
New York (State)
2,479
Florida
2,359
Idaho
2,330
Japan
2,244
India
2,123
Mexico
2,046
England
2,041
France
1,970
Germany
1,842
North America
1,749
Washington (D.C.)
1,698
Pennsylvania
1,641
Canada
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Call Number
93,545
Q - Science
64,158
H - Social Science
59,956
T - Technology
50,751
K - Law
43,154
P - Language and Literature
38,880
R - Medicine
more ...
36,358
E - United States History
31,703
L - Education
23,452
G - Geography, Anthropology, Recreation
18,567
D - World History
18,067
M - Music
16,591
A - General Works
15,822
B - Philosophy, Psychology, Religion
14,124
F - General American History
13,409
S - Agriculture
12,345
C - Historical Sciences
12,231
J - Political Science
10,344
N - Fine Arts
3,498
Z - Library Science
2,216
U - Military Science
1,951
V - Naval Science
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Year of Publication