This collection consists mostly of research compiled by Joan Moore for various studies she conducted, particularly on two Los Angeles-based Mexican American gangs: White Fence and El Hoyo Maravilla. It includes dozens of transcripts of interviews with gang members and their families, as well as some of the original audio tapes. There are also secondary research materials such as clippings and articles and maps of gang activity. There is also some material for a study of women and heroin abuse.