Author/Creator
- United States. National Park Service64
- United States25
- United States. Environmental Protection Agency. Office of Solid Waste and Emergency Response25
- United States. Bureau of Land Management23
- United States. General Accounting Office23
- United States. National Park Service. Denver Service Center22
- United States. Forest Service21
- United States. Federal Highway Administration19
- United States. Department of Energy. Assistant Secretary for Environment, Safety, and Health18
- United States. Forest Service. Intermountain Region18
- Pacific Northwest Research Station (Portland, Or.)17
- U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Systems Research17
- United States. Congress. House. Committee on Expenditures in the Department of Agriculture17
- United States. Congress. Office of Technology Assessment17
- United States. Department of Energy17
- Technology Sharing Program (U.S.)13
- United States. Congress. Senate. Committee on Governmental Affairs12
- United States. Forest Service. Southwestern Region11
- United States. National Aeronautics and Space Administration11
- Intermountain Research Station (Ogden, Utah)10