"United States. Environmental Protection Agency. Robert S. Kerr Environmental Research Laboratory (Ada, Okla.)" . . . . "Robert S. Kerr Environmental Research Laboratory. U.S. Environmental Protection Agnecy" . . "EPA" . . "Illinois State Water Survey. Department of Energy and Natural Resources" . . . . . . . . . . "A guide to the selection of materials for monitoring well construction and ground-water sampling"@en . "A guide to the selection of materials for monitoring well construction and ground-water sampling" . . . "Project summary"@en . . . . . . . . . . . . . . . . . . . . . . . "Scelta del materiale per i pozzi di monitoraggio"@it . . . . "A guide to the selection of materials : for monitoring well construction and ground-water sampling" . . . .