1. Potentiometric surface of the upper Floridan Aquifer in the Ichetucknee springshed and vicinity, northern Florida, September 2003 Author/Creator: Sepúlveda, Agustín A. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2006 Resource Type: Map Access & Availability: Loading