TY - RPRT TI - Potentiometric surface of the upper Floridan Aquifer, west-central Florida, September 1999 AU - A. D. Duerr AU - A. E. Torres PY - 2000 DO - 10.3133/ofr00226 UR - https://pubs.usgs.gov/publication/ofr00226 ID - ofr00226 ER -