Rodríguez-Martínez, Jesús. <br/><br/>
Geologic and hydrologic data collected at test holes NC-1 and NC-3, Guaynabo and San Juan, eastern Puerto Rico 
by Jesús Rodríguez-Martínez, Richard A. Scharlach, and Arturo Torres-González. 
 - San Juan, P.R.  Geological Survey  1991. 
 - iv, 20 p.  ill.  28 cm. 
 - Open-file report (U.S. Geological Survey)  91-217 .
<br/><br/><label>LCCN: </label>doc92000726  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Puerto Rico--Guaynabo.<br/>Hydrology--Puerto Rico--Guaynabo.<br/>Hydrology--Puerto Rico--San Juan.<br/>Geology--Puerto Rico--San Juan.