01524nam a2200325Ia 4500001000700000003000600007005001700013008004100030040002300071043001200094050002200106070002700128072000900155074001100164086002200175100003300197245022500230260013600455300005700591490005800648500003400706504005200740650006500792650007500857650007400932650006601006700003401072710005401106710003801160266518OCoLC20200624062624.0990513s1999    pr ab    b   f000 0 eng d  aGIScGISdGPOdAGL  anwpr--- 4aQE75b.W3 99-40400 aGB701.W375bno.99-4040 0aW000  a0624-B0 aI 19.42/4:99-40401 aConde-Costas, Carlos.2Local10aAssessment of nitrate contamination of the upper aquifer in the Manatí-Vega Baja area, Puerto Ricocby Carlos Conde-Costas and Fernando Gómez-Gómez ; in cooperation with the Puerto Rico Environmental Quality Board.  aSan Juan, P.R.bU.S. Dept. of the Interior, U.S. Geological SurveyaDenver, CObBranch of Information Services [distributor]c1999.  av, 43 p.bill. (some col.), maps (some col.)c28 cm. 0aWater resources investigations reportv99-40402Local  aShipping list no.: 99-0235-P.  aIncludes bibliographical references (p. 36-38). 0aGroundwaterxPollutionzPuerto RicozManatí Region.2Local 0aNitratesxEnvironmental aspectszPuerto RicozVega Baja Region.2Local 0aNitratesxEnvironmental aspectszPuerto RicozManatí Region.2Local 0aGroundwaterxPollutionzPuerto RicozVega Baja Region.2Local1 aGomez-Gomez, Fernando.2Local1 aJunta de Calidad Ambiental de Puerto Rico.2Local  aGeological Survey (U.S.)  2Local