TY - RPRT TI - Potentiometric surface of the Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, September 1982 AU - George R. Schiner AU - Eugene C. Hayes PY - 1982 DO - 10.3133/ofr8330 UR - https://pubs.usgs.gov/publication/ofr8330 ID - ofr8330 ER -