@book{41255,
	author = {Robert A. Renken ; W. C. Ward ; I.P. Gill ; [Et al.]},
	title = {Geology and Hydrogeology of the Caribbean Islands Aquifer System of the Commonwealth of Puerto Rico and the U.S. Virgin Islands},
	publisher = {U.S. Geological Survey},
	year = {2002},
	address = {Virginia}
}