Richmond 2005, p. 10 Richmond, Al (April–June 2005). "The Other El Tovar"(PDF). The Ol' Pioneer. 16 (2). Grand Canyon Historical Society: 3, 10. Archived from the original(PDF) on November 10, 2014. Retrieved May 17, 2013.
Richmond 2005, p. 10 Richmond, Al (April–June 2005). "The Other El Tovar"(PDF). The Ol' Pioneer. 16 (2). Grand Canyon Historical Society: 3, 10. Archived from the original(PDF) on November 10, 2014. Retrieved May 17, 2013.