TY - RPRT TI - Pb-Sr isotopic and geochemical constraints on sources and processes of lead contamination in well waters and soil from former fruit orchards, Pennsylvania, USA: A legacy of anthropogenic activities AU - Robert A. Ayuso AU - Nora K. Foley PY - 2016 DO - 10.1016/j.gexplo.2016.08.008 UR - https://pubs.usgs.gov/publication/70184987 ID - 70184987 ER -