TY - RPRT TI - Three-dimensional steady-state simulation of flow in the sand-and-gravel aquifer, southern Escambia County, Florida AU - Henry Trapp AU - L.H. Geiger PY - 1986 DO - 10.3133/wri854278 UR - https://pubs.usgs.gov/publication/wri854278 ID - wri854278 ER -