This material was shipped to Fenwick Library Special Collections, George Mason University, Fairfax, VA on 23 October 2000. We have the publisher's reprint, which is just one sheet, printed on both sides. It has no page numbers. This paper is one of a set of two reprints by STOC in same 1990 bibliography. Warfield, J. N., "Switching Circuits as Topological Models in the Discrete Probability Theory" this title was one of two by Warfield listed in 1990 bibliography published the STOC (Symposium on Theory of Computing)/FOCS (IEEE Symposium on Foundations of Computer Science).