City Gangs by Walter Miller. This is a book that was not previously published.  Scott Decker and his colleagues at Arizona State University re-typed, edited and indexed the manuscript that they acquired after Miller’s death.  It makes a nice contribution to gang research.

The Gang Crime Prevention Center, Illinois, USA

Office of Juvenile Justice and Delinquency Prevention (OJJDP), US Department of Justice

OJJDP Publications Search (USA)

Justice Information Center (NCJRS) Juvenile Justice, USA Documents on Gangs

National Youth Gang Center, USA

National Institute of Justice, USA

Project Exit - Leaving Violent Youth Groups, Norway. Focus on racist youth groups