Weeks, John R. 1944- Population : an introduction to concepts and issues / John R. Weeks. - 3rd ed. - Belmont, Calif. : Wadsworth Pub. Co., c1986. - xviii, 525 p. : ill. ; 25 cm. Includes index. Bibliography: p. 481-513. ISBN: 0534061389 9780534061388 Subjects--Topical Terms: Population.Población Demografía LC Class. No.: HB 871 / W395p 1986 Dewey Class. No.: 304.6