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Collection
299,099
Electronic Access
144,548
Gov Pub Electronic
141,560
Main Books 3rd Floor
75,599
Gov Pub Microfiche
58,841
Storage Gov Pub
24,452
CO Gov Pub Electronic
more ...
12,206
Audio and Visual 1st Floor
8,125
Storage Books
7,423
Storage Folded Maps
6,902
Spec Coll 3rd Floor
6,126
Microfilm 2nd Floor
5,471
Juv Coll 2nd Floor
3,532
New Books 1st Floor
3,324
Ref Coll 1st Floor
2,029
Spec Coll Energy 3rd Floor
1,846
Storage Flat Maps
1,828
Flat Maps 2nd Floor
1,541
Oversize 3rd Floor
1,387
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
262,951
Book
259,825
eBook
146,363
Electronic
40,156
Microfilm
36,647
Video
18,771
Map
more ...
11,625
Unknown
7,857
Serial
6,402
CD
4,666
Text
4,386
Musical Score
4,245
Record
2,559
Journal
2,167
DVD
1,042
VHS
790
Audio
674
Photo
674
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
14,291
Geology
9,247
Appropriations and expenditures
6,642
Rules and practice
6,518
Management
5,265
United States Foreign relations
4,806
Mines and mineral resources
more ...
4,675
Groundwater
4,357
Geology, Stratigraphic
4,323
History
4,319
Water quality
4,256
Artificial intelligence
4,199
Officials and employees
4,098
Economics
3,469
Health
3,217
Business
3,114
Water-supply
2,981
United States Politics and government
2,904
Criticism and interpretation
2,816
United States History
2,701
Computer security
2,700
National security
2,696
Auditing
2,602
Mathematics
2,545
Evaluation
2,275
Operas
2,086
Entrepreneurship
2,043
United States
2,031
Computer science
2,026
Selection and appointment
1,814
Aquifers
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Author
111,661
SpringerLink (Online service)
40,169
ScienceDirect (Online service)
30,766
Geological Survey (U.S.)
25,820
Infobase,
18,168
Geological Survey (U.S.),
15,222
Literature Online (Online Service)
more ...
12,930
Oxford Scholarship Online
11,841
Films for the Humanities & Sciences (Firm)
11,799
Infobase
10,462
Library of Congress. Congressional Research Service,
7,445
EBSCOhost
3,998
United States,
3,391
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
2,338
U.S. Fish and Wildlife Service
2,205
United States. National Park Service
2,126
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
1,843
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
1,475
United States. Congress. House. Committee on the Judiciary
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Language
789,651
English
8,936
Spanish
7,228
No linguistic content
5,673
German
5,538
French
4,996
eng
more ...
3,649
Italian
1,760
Russian
1,103
Undetermined
826
Latin
733
Chinese
564
Japanese
384
Portuguese
281
Ancient Greek
258
Multiple
236
Dutch
228
Arabic
221
Polish
185
Swedish
158
Greek
149
Hebrew
140
Czech
134
Korean
124
Norwegian
122
Hungarian
111
Danish
85
Vietnamese
47
Romanian
45
Turkish
43
Tagalog
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Genre
35,761
Conference papers and proceedings
32,958
Fiction
28,532
Sound recordings
26,042
Video recordings
23,490
Internet videos
21,771
Maps
more ...
16,966
Dictionaries
14,463
Periodicals
13,736
Legislative hearings
13,333
Biographies
12,960
Statistics
11,924
Handbooks and manuals
10,664
Bibliographies
9,081
Legislative materials
6,975
Technical reports
3,741
Case studies
3,707
Congresses
3,635
Scores
3,395
Topographic maps
3,072
Autobiographies
2,969
Operas
2,709
Drama
2,705
Statutes and codes
2,673
Instructional television programs
2,660
Excerpts
2,595
Treaties
2,448
Catalogs
2,214
Literature
1,834
Illustrated works
1,600
Academic theses
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Literary Form
Era
10,946
20th century
5,198
19th century
2,759
21st century
1,581
18th century
1,021
1564-1616
991
Civil War, 1861-1865
more ...
976
17th century
895
1945-
838
Cretaceous
752
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
186,896
United States
28,772
Colorado
8,658
California
7,158
Great Britain
5,282
China
5,254
Alaska
more ...
3,904
Europe
3,869
New Mexico
3,865
Utah
3,616
Arizona
3,359
Nevada
3,229
West (U.S.)
3,180
Texas
2,983
Wyoming
2,952
Montana
2,931
Oregon
2,852
Washington (State)
2,720
New York (State)
2,482
Florida
2,360
Idaho
2,342
Japan
2,258
India
2,129
Mexico
2,052
England
2,050
France
1,976
Germany
1,852
North America
1,755
Washington (D.C.)
1,700
Pennsylvania
1,655
Canada
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Call Number
93,926
Q - Science
64,414
H - Social Science
60,168
T - Technology
50,819
K - Law
43,396
P - Language and Literature
39,211
R - Medicine
more ...
36,452
E - United States History
31,897
L - Education
24,093
G - Geography, Anthropology, Recreation
18,619
D - World History
18,002
M - Music
16,446
A - General Works
15,917
B - Philosophy, Psychology, Religion
14,140
F - General American History
13,633
S - Agriculture
12,378
C - Historical Sciences
12,300
J - Political Science
10,370
N - Fine Arts
3,510
Z - Library Science
2,239
U - Military Science
1,953
V - Naval Science
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Year of Publication