Front cover image for Evaluation of methods for delineating areas that contribute water to wells completed in valley-fill aquifers in Pennsylvania

Evaluation of methods for delineating areas that contribute water to wells completed in valley-fill aquifers in Pennsylvania

Print Book, English, 1994
U.S. Geological Survey ; USGS Earth Science Information Center, Open-File Reports Section [distributor], Lemoyne, Pa., Denver, CO, 1994