found: His The Cabinet in Congress, 1958.
found: U.S. Representative Stephen Horn WWW home page, viewed 12-12-02 (represents 38th Distr., Calif.)
found: Congressional directory website (107th Congress), viewed 03-23-04 (Stephen Horn; b. May 31, 1931; represents 39th Distr., Calif.)
found: Superfund reform act of 1994, 1994: p. 260 (Steve Horn)
found: Biographical directory of the United States Congress online, viewed August 17, 2012 (Horn, John Stephen (Steve), a Representative from California; born in San Juan Bautista, San Benito County, Calif., May 31, 1931; died on February 17, 2011, in Long Beach, Calif.)