1998 Annual Report on School Safety - Gangs
Provides a description of model programs for dealing with gangs including: Alternatives to Gang Membership, Gang Resistance Education and Training (GREAT), and Community Organizations United to Reduce the Area's Gang Enviroment (Project COURAGE).
http://www.ed.gov/pubs/AnnSchoolRept98/gangs.html

Early Warning, Timely Response - Gangs
Gang affiliation is one of many warning signs that may lead to violent or aggressive behavior.
http://www.air-dc.org/cecp/guide/

Hybrid and Other Modern Gangs
This Bulletin describes the nature of modern youth gangs, in particular, hybrid gangs.
http://www.ncjrs.org/pdffiles1/ojjdp/189916.pdf