@book{30429,
	author = {Pease, Maurice Henry, and Puerto Rico.},
	title = {Cretaceous and Lower Tertiary stratigraphy of the Naranjito and Aguas Buenas quadrangles and adjacent areas, Puerto Rico,},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1968.},
	series = {Geological Survey bulletin 1253},
	address = {Washington,},
	note = {Work done in cooperation with the Department of Industrial Research, Puerto Rico Economic Development Commission.}
}