RT Article T1 A study of police discretion in six southern cities JF Journal of police science and administration VO 17 IS 1 SP 1 OP 7 A1 Powell, Dennis D. LA English YR 1990 UL https://krimdok.uni-tuebingen.de/Record/1640039872 K1 Polizei K1 Strafverfolgung K1 Ermessen K1 Selektion K1 Rasseneinflüsse