@book{257215,
	author = {Briggs, Reginald Peter and Geological Survey (U.S.)  },
	title = {Changes in Stratigraphic nomenclature in the Cretaceous system, east-central Puerto Rico},
	publisher = {U.S.Govt. Print. Off.},
	year = {1969},
	address = {Whashington},
	note = {As of 07/01/2016, GPO could not validate the distribution status of this little for the FDLP. 

"Prepared in cooperation with the Commonwealth of Puerto Rico Economic Development Administration, Industrial Research Department. }
}