The Southwestern Historical Quarterly, Volume 63, July 1959 - April, 1960

Captain William P. Erwin, pilot of the "Dallas Spirit"

Texas State Historical Association. The Southwestern Historical Quarterly, Volume 63, July 1959 - April, 1960. Austin, Texas. The Portal to Texas History. http://texashistory.unt.edu/ark:/67531/metapth101186/. Accessed July 1, 2015.