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Author/Creator
- Geological Survey (U.S.)6
- Berenbrock, Charles1
- Carlson, Paul R. (Paul Roland), 1933-1
- Florida. Department of Environmental Regulation1
- Gardner, James V.1
- Idaho. Division of Environmental Quality1
- Long, William A. (William Atwood), 1937-1
- McGee, Benton D.1
- McPherson, Benjamin F.1
- Sabanskas, Maryann1
- Shreveport (La.). Department of Operational Services1
- United States. Environmental Protection Agency1
- United States. National Park Service1
- Watts, Kenneth R.1
- Woods, Paul F.1