Author
SpringerLink (Online service)
73,277
ScienceDirect (Online service)
39,194
SpringerLink (Online Service)
37,679
Geological Survey (U.S.)
30,514
Infobase,
23,924
Geological Survey (U.S.),
18,125
Literature Online (Online Service)
15,222
Oxford Scholarship Online
12,704
Films for the Humanities & Sciences (Firm)
11,568
Infobase
11,527
Library of Congress. Congressional Research Service,
10,378
EBSCOhost
7,444
United States,
3,988
United States. Bureau of Mines
3,384
Educational Resources Information Center (U.S.)
2,564
National Renewable Energy Laboratory (U.S.),
2,512
Law Library of Congress (U.S.). Global Legal Research Directorate,
2,462
United States. Congress. House. Committee on Rules
2,427
U.S. Fish and Wildlife Service
2,332
United States. National Park Service
2,195
United States. Bureau of Land Management
2,128
Prendismo, LLC (Firm)
2,123
United States. Congress. Senate. Committee on Energy and Natural Resources
2,023
ProQuest (Firm)
1,980
United States. Forest Service
1,823
Colorado State University. Cooperative Extension Service
1,777
National Renewable Energy Laboratory (U.S.)
1,685
United States. Environmental Protection Agency
1,665
Public Broadcasting Service (U.S.)
1,631
United States. Bureau of the Census
1,511
United States. Congress. House. Committee on the Judiciary
1,475
United States. Congress. Senate. Committee on Foreign Relations
1,474
Colorado. General Assembly. Legislative Council
1,459
National Center for Education Statistics
1,441
National Institute of Standards and Technology (U.S.)
1,366
U.S. Atomic Energy Commission
1,361
National Center for Health Statistics (U.S.),
1,301
United States. Forest Service,
1,296
United States. Congress. House. Committee on Natural Resources,
1,273
United States. Department of State
1,269
Colorado. Office of State Auditor
1,265
United States. Department of Health and Human Services. Office of Inspector General,
1,213
United States. Congress. House. Committee on Resources
1,209
United States. Bureau of Reclamation
1,198
United States. Central Intelligence Agency
1,181
United States. Congress. House. Committee on International Relations
1,169
United States. President (1993-2001 : Clinton)
1,149
United States. National Aeronautics and Space Administration
1,135
Ebooks Corporation
1,124
United States. Congress. House. Committee on Appropriations
1,124
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