O'Brien, Ellen; Lyle Benedict. 1919, July 21: Dirigible (Balloon) Crash. Deaths, Disturbances, Disasters, and Disorders in Chicago. Chicago Public Library. June 2001 [2007-08-27]. (原始内容存档于2006-09-27).
O'Brien, Ellen; Lyle Benedict. 1919, July 21: Dirigible (Balloon) Crash. Deaths, Disturbances, Disasters, and Disorders in Chicago. Chicago Public Library. June 2001 [2007-08-27]. (原始内容存档于2006-09-27).
Plane Crash. The Marden History Group. [22 January 2011]. (原始内容存档于2 October 2011).