[Ada, OK] : United States Environmental Protection Agency, Office of Research and Development, Office of Solid Waste and Emergency Response : Superfund Technology Support Center for Ground Water, Robert S. Kerr Environmental Research Laboratory, [1991]
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : For sale by U.S. Geological Survey, Branch of Information Services, 2000