Essays on sociology and social psychology / Karl Mannheim ; edited by Paul Kecskemeti. Mannheim, Karl 1893-1947. Kecskemeti, Paul. editor Sociology. Social psychology. 301.154 MAE Includes index. London : Routledge & Kegan Paul, 1953. 1953. 1953 Text viii, 319 p. ; eng International library of sociology and social reconstruction