1. Pesticides and their metabolites in community water-supply wells of central and western New York, August 1999 Author/Creator: Eckhardt, David A., author Publication/Creation: Ithaca, New York : U.S. Geological Survey, Department of the Interior, 2001 Format: Book Access & Availability: Loading
2. Chlorinated organic compounds in ground water at Roosevelt Field, Nassau County, Long Island, New York Author/Creator: Eckhardt, David A., author Publication/Creation: Syosset, New York : U.S. Geological Survey, 1989 Format: Book Access & Availability: Loading
3. Relation between land use and ground-water quality in the upper glacial aquifer in Nassau and Suffolk counties, Long Island, New York Author/Creator: Eckhardt, David A., author Publication/Creation: Syosset, New York : U.S. Geological Survey, 1989 Format: Book Access & Availability: Loading
4. Ground-water movement in the upper glacial aquifer in the Manorville area, Town of Brookhaven, Long Island, New York, in November 1983 Author/Creator: Eckhardt, David A., author Publication/Creation: Syosset, New York : U.S. Geological Survey, 1986 Format: Book Access & Availability: Loading
5. Sediment discharge from an area of highway construction, Applemans Run basin, Columbia County, Pennsylvania Author/Creator: Eckhardt, David A., author Publication/Creation: Harrisburg, Pa. : U.S. Geological Survey, 1976 Format: Book Access & Availability: Loading