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Author/Creator
- Geological Survey (U.S.)5
- Arkansas Soil and Water Conservation Commission2
- Gonthier, Gerard J. (Gerard Joseph), 1962-1
- Irwin, Don J.1
- Kilpatrick, John M.1
- Mahon, Gary L.1
- Poynter, David T.1
- Pugh, Aaron L.1
- Putnam County (N.Y.). Department of Health1
- Southwest Florida Water Management District (Fla.)1
- Westerfield, Paul W.1
- Yobbi, D. K.1