Encyclopedia of Gambling, Carl Sifakis, Facts on File: New York, 1990, p. 290.
Science and Invention in Pictures, “A Gambler’s Tricks Exposed,” Mark Mellen, June 1924, p. 146.
Syracuse Herald (N.Y.), “Thrilling Fact Story of Gambling in the United States,” July 24, 1921.
The Brownsville Herald (Texas), “New York Letter, Paul Harrison,” July 14, 1933.
The Fort Wayne News and Sentinel (Texas), “Modern Gambling Methods,” May 3, 1919.
The Inter Ocean (Chicago, Ill.), “The Confessions of a Gambler,” May 28, 1911.