TY - RPRT TI - Potentiometric surface of the upper Floridan aquifer, in Georgia, and adjacent parts of Alabama, Florida, and South Carolina, May-June 1990 AU - Michael F. Peck PY - 1991 DO - 10.3133/ofr91206 UR - https://pubs.usgs.gov/publication/ofr91206 ID - ofr91206 ER -