@book{51524,
	author = {López, Adalberto. and Petras, James F.},
	title = {Puerto Rico and Puerto Ricans},
	publisher = {Schenkman Pub. Co.; [distributed by Halsted Press, New York},
	year = {1974]},
	address = {Cambridge, Mass.},
	note = {"A Halsted Press book."}
}