Thirty years of change in Puerto Rico; a case study of ten selected rural areas [by] Dorothy Dulles Bourne and James R. Bourne. - New York, F. A. Praeger [1966] - xxvi, 411 p illus 25 cm. Bibliography: p. 403-411. Subjects--Topical Terms: Community development--Case studies.--Puerto Rico Subjects--Geographic Terms: Puerto Rico--Social conditions--1952- LC Class. No.: HN233.5 / .B6