RT Book T1 Groups in harmony and tension: an integration of studies on intergroup relations A1 Sherif, Muzafer 1906-1988 A2 Sherif, Carolyn W. 1922-1988 LA English PP New York PB Octagon Books YR 1973 ED 1953, repr., 2nd pr. UL https://krimdok.uni-tuebingen.de/Record/1092956093 CN 301.15