RT Book T1 Prevention and control of collective violence T2 Criminal justice research A1 Callahan, William T. A1 Knoblauch, Richard A2 Knoblauch, Richard LA English PP Washington, D.C. PB U.S. Dept. of Justice, Law Enforcement Assistance Administration YR 1973 UL https://krimdok.uni-tuebingen.de/Record/1098688899