Torres González, Arturo. <br/><br/>
Use of surface-geophysical techniques for ground-water exploration in the Canovanas-Rio Grande area, Puerto Rico 
by Arturo Torres-González ; prepared in cooperation with the Department of Agriculture of the Commonwealth of Puerto Rico. 
 - San Juan, P.R.  Denver, Colo.  U.S. Dept. of the Interior, Geological Survey  Open-File Services Section, Western Distribution Branch  1985. 
 - v, 29 p.  ill., maps  28 cm. 
 - U.S. Geological Survey water resources-investigations report  83-4266 .
<br/><br/>Bibliography: p. 28-29. 
<br/><br/><label>LCCN: </label>gp 86012803  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water, Under ground--Puerto Rico.<br/>Groundwater flow--Puerto Rico.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico
<br/><br/><label>Gov. Doc. Class. No.: </label>I 19.42/4:83-4266