RT Book T1 A comparative study of delinquent behavior manifestations in 100 delinquent and 100 non-delinquent negro boys A1 Diggs, Mary H. LA English PP Ann Arbor, Mich. PB Univ. Microfilms YR 1978 UL https://krimdok.uni-tuebingen.de/Record/1094058394 K1 Hochschulschrift