RT Article T1 Visible school security measures and student academic performance, attendance, and postsecondary aspirations JF Journal of youth and adolescence VO 45 IS 1 SP 195 OP 210 A1 Tanner-Smith, Emily E. A1 Fisher, Benjamin W. A2 Fisher, Benjamin W. LA English YR 2016 UL https://krimdok.uni-tuebingen.de/Record/1912745224 DO 10.1007/s10964-015-0265-5