RT Article T1 The value of corrections research: learning what works JF Federal probation VO 55 IS 2 SP 24 OP 26 A1 Petersilia, Joan 1951-2019 LA English YR 1991 UL https://krimdok.uni-tuebingen.de/Record/1639966846 K1 Strafvollzug K1 Evaluation K1 Strafvollzugsforschung