TY - RPRT TI - Geochemical and isotopic composition of ground water with emphasis on sources of sulfate in the upper Floridan Aquifer in parts of Marion, Sumter, and Citrus counties, Florida AU - Laura A. Sacks PY - 1996 DO - 10.3133/wri954251 UR - https://pubs.usgs.gov/publication/wri954251 ID - wri954251 ER -