@book{110265,
	author = {Briggs, Reginald Peter and Gelabert, P. A. and Puerto Rico.},
	title = {Preliminary report of the geology of the Barranquitas quadrangle, Puerto Rico},
	publisher = {United States Geological Survey},
	year = {1962.},
	series = {Miscellaneous geologic investigations map / United States Geological Survey},
	address = {Washington, D.C.},
	note = {Five cross sections in margin.}
}