RT Book T1 A critical history of police reform: the emergence of professionalism T2 Lexington Books A1 Walker, Samuel 1942- LA English PP Lexington, Mass. u.a. PB Lexington Books YR 1977 UL https://krimdok.uni-tuebingen.de/Record/010920242 CN HV8138 SN 0669012920 K1 Police : United States : History K1 Police professionalization : United States : History K1 USA : Polizei