TY - RPRT TI - Potentiometric surface and hydrologic conditions of the upper aquifer in the Manatí-Vega Baja area, north central Puerto Rico, March 1995 AU - Carlos Conde-Costas AU - Gilberto Rodriguez-Rodriguez PY - 1997 DO - 10.3133/wri964184 UR - https://pubs.usgs.gov/publication/wri964184 ID - wri964184 ER -