Sadomasochism

This record represents the run of Checkmate held in the Tretter Collection. It is not a complete run but contains all issues from 1992 up to 2000.

This record represents the run of Drummer held in the Tretter Collection. It is not a complete run but contains issues from a wide range of years of the publication from 1975 up to 1998.

This record represents the run of Dungeon Master held in the Tretter Collection. It is not a complete run but contains issues from a wide range of years of the publication from 1981 up to 1994.

The Robert F. Johnson papers, 1945-2007, comprise the personal and professional records of Robert F. Johnson, Ph. D., Professor Emeritus at the University of Minnesota. Content Notice - Pornographic Content: this collection contains highly explicit material regarding BDSM practices, including graphic body modification, master-slave rhetoric, and photographs that contain Nazi symbolism/uniforms worn or displayed in a sexualized context.