TY - RPRT TI - Horizontal anisotropy of the principal ground-water flow zone in the Salinas alluvial fan, Puerto Rico AU - V. Quinones-Aponte PY - 2005 DO - 10.1111/j.1745-6584.1989.tb01969.x UR - https://pubs.usgs.gov/publication/70015060 ID - 70015060 ER -