RT Article T1 Race, poverty, and exclusionary school security: An empirical analysis of U.S. elementary, middle, and high schools JF Youth violence and juvenile justice VO 12 IS 4 SP 332 OP 354 A1 Kupchik, Aaron 1972- A2 Ward, Geoff LA English YR 2014 UL https://krimdok.uni-tuebingen.de/Record/1912673991 DO 10.1177/1541204013503890