RT Book T1 The effectiveness of modeling a socially approved and a socially disapproved behavior with a group of delinquent and non delinquent boys A1 Pappachriston, James LA English PP Ann Arbor, Mich. PB Xerox Univ. Microfilms YR 1976 UL https://krimdok.uni-tuebingen.de/Record/1094376345 K1 Hochschulschrift