Public health and population change : current research issues / Ed. by Mindel C. Sheps and Jeanne Clare Ridley. Symposium on Research Issues in Public Health and Population Change, (1964 : University of Pittsburgh) Sheps, Mindel C. University of Pittsburgh. Graduate School of Public Health. Public health Congresses. Population Congresses. Family planning Congresses. 301.32 SHP [Pittsburgh] Univ. of Pittsburgh Press [c1965] [c1965] 1965 Text xvii, 557 p. : eng