RT Article T1 Executive Summary, Stage 1: Assessment A1 Spergel, Irving A. A2 Oh, Sandra 1971- A2 Simmons, Edwina A2 Alexander, Alba A2 Ross, Ruth A2 Kane, Candice A2 Chance, Ron A2 Curry, David LA English PB National Youth Gang Information Center YR 1990 UL https://krimdok.uni-tuebingen.de/Record/1912548615