RT Article T1 Gang affiliation as a measure of social structure in social structure social learning theory JF Deviant behavior VO 38 IS 8 SP 870 OP 878 A1 Tolle, Heather LA English YR 2017 UL https://krimdok.uni-tuebingen.de/Record/1912563584 DO 10.1080/01639625.2016.1206712