Sources: Mobsters Threaten Hollywood Filmmaker

IMDB, “Frank Seltzer,” imdb.com.

Los Angeles Times (Calif.), “The Screen in Review,” July 20, 1950.

Lubbock Morning Avalanche (Tex.), “Movie to be Made on Story of Pendergast Era in Kansas City,” Aug. 17, 1950.

Nevada State Journal, “Producer Filming Movie About Race Wires Says he Was Threatened in Vegas,” June 15, 1950.

The Salt Lake Tribune (Utah), “Inside Story of Bookies Told in Film,” July 31, 1950.