Rodríguez-Martínez, J., Santiago-Rivera, Luis et al. <br/><br/>
Surface-water, water-quality, and ground-water assessment of the municipio of Ponce, Puerto Rico, 2002-2004 
by Jesús Rodríguez-Martínez, Luis Santiago-Rivera, José M. Rodríguez, and Fernando Gómez-Gómez ; prepared ib cooperation with the Municipio Autónomo de Ponce, Puerto Rico and the Office of the Mayor. 
 - Reston, Va.  U.S. Dept. of the Interior, U.S. Geological Survey  2006 
 - vii, 96 p.  ill. (some col.), maps (some col.)  28 cm. 
 - U.S. Geological Survey scientific investigations report  2005-5243 .
<br/><br/>Includes bibliographical references (p. 94-96). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrology--Puerto Rico--Ponce<br/>Water Pollution--Puerto Rico--Ponce<br/>Groundwater--Puerto Rico--Ponce<br/>Surface water--Puerto Rico--Ponce