@book{76457,
	author = {Hayes, Thomas S. and Velázquez, Gonzalo.},
	title = {What kind of library service for Puerto Rico's 2,000 000 Americans? / Thomas S. Hayes and Gonzalo Velázquez.},
	note = {In Library Journal. Publication for the year, 1948. New York, March 1, 1948. vol. 73-no. 5. p. 368-372.}
}