Weeks, John Robert, 1944- Population : an introduction to concepts and issues / John R. Weeks. - 7th ed. - Belmont, CA : Wadsworth Publishing, c1998. - xxi, 671 p. : ill. ; 25 cm. Includes bibliographical references (p. 611-645) and index. ISBN: 0534553052 Subjects--Topical Terms: Population. LC Class. No.: HB871 / .W43 1998