"Beckham, John Crepps Wickliffe". Biographical Directory of the UnitedStatesCongress. Retrieved 2009-10-13. Harrison, p. 65 دەروازەی مێژوو دەروازەی ژیاننامە
Library of Congress. New York, London, H. Markley. "unitedstates at the 1904 summer olympics: Latest News & Videos, Photos about unitedstates at the 1904