Author
United States. Government Accountability Office
348
United States. General Accounting Office
323
National Research Council (U.S.). Transportation Research Board
204
United States. National Park Service
202
United States. Federal Aviation Administration
152
United States. Federal Highway Administration
129
American Association of State Highway and Transportation Officials
106
Institute of Electrical and Electronics Engineers
100
Safari Books Online
86
Airport Cooperative Research Program
79
United States. Bureau of Land Management
70
United States. Federal Transit Administration
56
United States. Congress. Senate. Committee on Energy and Natural Resources
53
Transit Development Corporation
48
Academic Video Online
46
CRM Learning (Firm)
46
Geological Survey (U.S.)
43
Transit Cooperative Research Program
43
SpringerLink (Online service)
42
United States. Environmental Protection Agency
42
National Cooperative Highway Research Program
41
United States. Department of State
41
Bloomberg News (Firm)
40
IEEE Communications Society
40
United States. Environmental Protection Agency. Office of Solid Waste and Emergency Response
36
United States. Congress. House. Committee on Natural Resources
35
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment
35
United States. Congress. Senate. Committee on Homeland Security and Governmental Affairs
35
United States. National Park Service. Denver Service Center
35
Henry Stewart Talks
34
United States
34
United States. Forest Service
34
Drucker, Peter F. (Peter Ferdinand), 1909-2005
33
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Aviation
33
IEEE Computer Society
32
International Federation for Information Processing
31
United States. National Aeronautics and Space Administration
30
United States. Small Business Administration
30
JSTOR
29
United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Economic Development, Public Buildings, and Emergency Management
29
United States. Congress. Senate. Committee on Commerce, Science, and Transportation
29
Technology Sharing Program (U.S.)
28
United States. Dept. of State
27
United States. Congress. House. Committee on Resources
26
United States. Congress. House. Committee on Ways and Means. Subcommittee on Social Security
26
Rocky Mountain Research Station (Fort Collins, Colo.)
25
U.S. Fish and Wildlife Service
25
United States. Congress. Senate. Committee on Environment and Public Works
25
International Development Research Centre (Canada)
24
Library of Congress. Congressional Research Service
23
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