found: Work cat.: NUCMC data from Idaho Oral History Center for Its Old Pen Tattoo Project interviews, 1993(prison tattoos)
found: LC database, Apr. 20, 2006(titles: Prison tattoos; Russian prison tattoos)
found: Wikipedia, Apr. 20, 2006(under Tattoo: "In the USA many prisoners and criminal gangs use distinctive tattoos to indicate facts about their criminal behavior, prison sentences, and organizational affiliation. This cultural use of tattoos predates the widespread popularity of tattoos in the general population, so older people may still associate tattoos with criminality.")
found: Anti-Defamation League WWW site, Apr. 20, 2006(under Prison tattoos: "Although many people entering the prison population are affiliated with the hate movement before their incarceration, prisoners from different ethnic backgrounds often join racist gangs once inside the penal system. They join these groups not only because they adhere to the gang's racist ideology, but also for protection and as a way to participate in criminal activity within the prison. These inmates' tattoos offer important information about gang affiliation, personal history and criminal activity.")
