@book{157697,
	author = {Pérez-Blair, Francisco. and Autoridad de Acueductos y Alcantarillados de Puerto Rico.},
	title = {Ground-water resources of alluvial valleys in northeastern Puerto Rico},
	publisher = {U.S. Dept. of the Interior, U.S. Geological Survey},
	year = {1997.},
	series = {Water resources investigations report},
	address = {San Juan, P.R.},
	note = {Shipping list no.: 97-0254-P.}
}