Inducing social change in developing communities : an international survey of expert advice / Herbert H. Hyman, Gene N. Levine, [and] Charles R. Wright. Hyman, Herbert Hiram, 1918- Levine, Gene Norman, 1930- joint author. Wright, Charles Robert, 1927- joint author. United Nations Research Institute for Social Development. HN980 .H9 309.2 UNI Geneva : United Nations Research Institute for Social Development, 1967. 1967. 1967 Text viii, 224 p. ; eng Developing countries Social conditions.