@book{110823,
	author = {United States},
	title = {Electrical analog model study of the alluvial aquifer in the Yabucoa valley, Puerto Rico.},
	year = {19-},
	series = {Open-File Report},
	address = {[Washington]},
	note = {"Prepared by the U.S. Geological Survey in cooperation with Puerto Rico Environmental Quality Board [and others].}
}