RT Article T1 U.S. Gang Problem Trends and Seriousness, 1996-2009 A1 Howell, James C. 19XX- A1 Griffiths, Elizabeth A1 Tita, George E. A1 Egley, Jr A2 Griffiths, Elizabeth A2 Tita, George E. A2 Egley, Jr LA English PB Office of Juvenile Justice and Delinquency Prevention YR 2011 UL https://krimdok.uni-tuebingen.de/Record/1912738236