TY - RPRT TI - Potentiometric surface of the alluvial aquifer and hydrologic conditions in the Santa Isabel-Juana Diaz area, Puerto Rico, March to April, 1987 AU - Felix Rodriguez-del-Rio AU - Fernando Gómez-Gómez PY - 1990 DO - 10.3133/wri894116 UR - https://pubs.usgs.gov/publication/wri894116 ID - wri894116 ER -