Smith, Thomas Lynn, 1903- Demography : Principles and methods / T. Lynn Smith, Paul E. Zopf, Jr. - 2nd ed. - Port Washington, N.Y. : Alfred Publ. Co., 1976. - xvii, 615 p. : ill. ; 24 cm. Includes bibliogr. references and indexes ISBN: 0882840339 Subjects--Topical Terms: Demography Dewey Class. No.: 301.32