TY - RPRT TI - Geochemistry and hydrology of perched groundwater springs: assessing elevated uranium concentrations at Pigeon Spring relative to nearby Pigeon Mine, Arizona (USA) AU - Kimberly R. Beisner AU - Nicholas V. Paretti AU - Fred D. Tillman AU - David L. Naftz AU - Donald J. Bills AU - Katherine Walton-Day AU - Tanya J. Gallegos PY - 2016 DO - 10.1007/s10040-016-1494-8 UR - https://pubs.usgs.gov/publication/70182714 ID - 70182714 ER -