TY - RPRT TI - Potentiometric surface of the upper Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, May 2000 AU - Leel Knowles PY - 2000 DO - 10.3133/ofr0115 UR - https://pubs.usgs.gov/publication/ofr0115 ID - ofr0115 ER -