http://www.prisontalk.com/forums/archive/index.php - Correctional officers testimonies, prisoners families, ex prisoners and so on give accounts here.
https://thehoodup.com/board/viewforum.php?f=23 - Contains sections about Surenos and some information about La Eme too.
http://www.streetgangs.com/billboard/ - Has an in depth section about prison gangs.
http://www.streetgangs.com/prison/mexican-mafia#sthash.VqWiZOgQ.dpbs
