Negatives, contact sheets, and photographic prints of the Gay Liberation Front (GLF) zap of the Behavior Modification Conference in Los Angeles, California, photographed by Mark Adrignola. Adrignola and Walter Blumoff had documented the event as freelance photographers. The Advocate published Adrignola's photographs in the November 11, 1970 issue on page one and page three.

Founded in 1969, the Gay Liberation Front (GLF) was a loosely structured group of gay rights activists who were interested in the radical sexual liberation for all people. This collection consists of publicity material, photographs, correspondence, clippings, and writings that relate primarily to the Los Angeles group of the Gay Liberation Front.