Hauberg, Clifford A. Puerto Rico and the Puerto Ricans by Clifford A. Hauberg. - New York Twayne Publishers [1975, c1974] - 211 p. - The Immigrant heritage of America series . 920422 Bibliography: p. 195-201. ISBN: 0805732594 LCCN: 74008812 //r90 Subjects--Topical Terms: Puerto Ricans--United States. Subjects--Geographic Terms: Puerto Rico--History. LC Class. No.: F1971 / .H38 1975 Dewey Class. No.: 917.295/03/53