TY - RPRT TI - Reconnaissance of arsenic concentrations in ground water from bedrock and unconsolidated aquifers in eight northern-tier counties of Pennsylvania AU - Dennis J. Low AU - Daniel G. Galeone PY - 2007 DO - 10.3133/ofr20061376 UR - https://pubs.usgs.gov/publication/ofr20061376 ID - ofr20061376 ER -