TY  - RPRT
TI  - Potentiometric surface of the upper Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, September 1987
AU  - L. A. Bradner
PY  - 1987
DO  - 10.3133/ofr87688
UR  - https://pubs.usgs.gov/publication/ofr87688
ID  - ofr87688
ER  -