[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, [1992]
[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]