TY  - BOOK
AU  - 
ED  - Puerto Rico.
ED  - Geological Survey (U.S.)  
TI  - Use of surface-geophysical techniques for ground-water exploration in the Canovanas-Rio Grande area, Puerto Rico
T2  - U.S. Geological Survey water resources-investigations report
PY  - 1985///
CY  - San Juan, P.R., Denver, Colo.
PB  - U.S. Dept. of the Interior, Geological Survey, Open-File Services Section, Western Distribution Branch
KW  - Water, Under ground
KW  - Puerto Rico
KW  - Local
KW  - Groundwater flow
N1  - Bibliography: p. 28-29
ER  -