@book{110563,
	author = {Monroe, Watson Hiner and Puerto Rico.},
	title = {Geology of the Vega Alta quadrangle, Puerto Rico},
	publisher = {United States Geological Survey},
	year = {1963.},
	series = {[Geologic quadrangle map of the United States] / United States Geological Survey},
	address = {Washington, D.C.},
	note = {Includes text on sheet.}
}