01185nam a2200265Ia 4500001000700000003000500007005001700012008004100029010001700070035002000087040001800107043000900125086002200134100003800156245024300194260014500437300003300582490008100615504002800696650004500724650004200769651002300811710004700834710003800881129703BIBL20240725062651.0860325s1985    pr ab        f00010 eng d  agp 86012803   a(OCoLC)13344390  aGIScGISdGPO  anwpr  aI 19.42/4:83-426620aTorres González, Arturo.2Local10aUse of surface-geophysical techniques for ground-water exploration in the Canovanas-Rio Grande area, Puerto Ricocby Arturo Torres-González ; prepared in cooperation with the Department of Agriculture of the Commonwealth of Puerto Rico.0 aSan Juan, P.R.bU.S. Dept. of the Interior, Geological SurveyaDenver, Colo.bOpen-File Services Section, Western Distribution Branchc1985.  av, 29 p.bill., mapsc28 cm. 0aU.S. Geological Survey water resources-investigations reportv83-42662Local  aBibliography: p. 28-29. 0aWater, Under groundzPuerto Rico.2Local 0aGroundwater flowzPuerto Rico.2Local 0aPuerto Rico2Local 0aPuerto Rico.bDept. of Agriculture.2Local 0aGeological Survey (U.S.)  2Local