TY - RPRT TI - Potentiometric surface of the upper Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, May 1998 AU - J.C. Adamski PY - 1998 DO - 10.3133/ofr98648 UR - https://pubs.usgs.gov/publication/ofr98648 ID - ofr98648 ER -