U.S. Dept. of the Interior, U.S. Geological Survey ; Earth Science Information Center, Open-File Reports Section [distributor],
Dugas, Diana L.
Pennsylvania. Bureau of Water Quality Management.
Geological Survey (U.S.)
U. S. Geological Survey open-file report ; 95-113, 95-193
Geographic Information System data sets of hydrogeologic conditions in Pequea and Mill Creek watersheds, Pennsylvania
Geographic Information System data sets of hydrogeologic conditions in Pequea and Mill Creek watersheds, Pennsylvania
Geographic Information System data sets of hydrogeologic conditions in Pequea and Mill Creek watersheds, Pennsylvania