Author
SpringerLink (Online service)
73,532
ScienceDirect (Online service)
39,580
SpringerLink (Online Service)
38,149
Geological Survey (U.S.)
30,632
Infobase,
25,820
Geological Survey (U.S.),
18,152
Literature Online (Online Service)
15,222
Oxford Scholarship Online
12,704
Films for the Humanities & Sciences (Firm)
11,841
Infobase
11,799
Library of Congress. Congressional Research Service,
10,462
EBSCOhost
7,446
United States,
3,998
United States. Bureau of Mines
3,388
Educational Resources Information Center (U.S.)
2,564
National Renewable Energy Laboratory (U.S.),
2,515
Law Library of Congress (U.S.). Global Legal Research Directorate,
2,462
United States. Congress. House. Committee on Rules
2,428
U.S. Fish and Wildlife Service
2,336
United States. National Park Service
2,205
United States. Bureau of Land Management
2,127
Prendismo, LLC (Firm)
2,123
ProQuest (Firm)
2,065
United States. Congress. Senate. Committee on Energy and Natural Resources
2,024
United States. Forest Service
1,825
Colorado State University. Cooperative Extension Service
1,778
United States. Environmental Protection Agency
1,698
National Renewable Energy Laboratory (U.S.)
1,688
Public Broadcasting Service (U.S.)
1,647
United States. Bureau of the Census
1,529
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
1,471
National Center for Education Statistics
1,450
United States. Bureau of Reclamation
1,438
National Institute of Standards and Technology (U.S.)
1,368
U.S. Atomic Energy Commission
1,362
National Center for Health Statistics (U.S.),
1,309
United States. Forest Service,
1,302
United States. Congress. House. Committee on Natural Resources,
1,282
United States. Department of State
1,274
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. Congress. House. Committee on International Relations
1,169
United States. Environmental Protection Agency. Office of Water
1,158
United States. President (1993-2001 : Clinton)
1,149
United States. Central Intelligence Agency
1,143
United States. National Aeronautics and Space Administration
1,141
Ebooks Corporation
1,126
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