RT Article T1 Delinquency rates as sources of ecological change JF The social ecology of crime SP 63 OP 74 A1 Bursik, Robert J. -2017 LA English YR 1986 UL https://krimdok.uni-tuebingen.de/Record/1464760411 SN 354096231X K1 Ökologie K1 Stadtprobleme K1 Rassenprobleme K1 USA