TY - RPRT TI - Detection of conduit-controlled ground-water flow in northwestern Puerto Rico using aerial photograph interpretation and geophysical methods AU - Jesús Rodríguez-Martínez AU - Ronald T. Richards PY - 2000 DO - 10.3133/wri004147 UR - https://pubs.usgs.gov/publication/wri004147 ID - wri004147 ER -