RT Book T1 Gang investigations: a street cop's guide A1 Watkins, Derrick A2 Ashby, Richard LA English PP Sudbury, Mass. u.a. PB Jones and Bartlett Publ. YR 2007 UL https://krimdok.uni-tuebingen.de/Record/1622668952 CN 363.25/9 SN 0763733911