1. Taubman Howard . “Exit the Fifties: A Synthesis of Ideas Marked the Decade.” New York Times, 13 December 1959.
2. Shapey Ralph . “Some Basic Concepts about my Work.” Shapey Collection, University of Chicago, Regenstein Library, 29 November 1960.
3. Weber Ben . How I Took 63 Years to Commit Suicide. Unpublished manuscript, n.d.