Key people
- ^ a b Boeing Chronology, 1997–2001 Archived January 2, 2013, at the Wayback Machine at boeing.com.
- ^ Welcome!, the former McDonnell Douglas Technical Services Company's homepage (January 24, 1997; retrieved June 4, 2009).
- ^ Yenne 1985, pp. 6–9.
- ^ Yenne 1985, pp. 10–12.
- ^ Leiser, Ken. "St. Louis aviation honored". St. Louis Post-Dispatch, August 28, 2009. Archived August 29, 2009, at the Wayback Machine
- ^ Johnston, Stanley (February 17, 1946). "Douglas DC-4 and DC-6 Skymasters". Chicago Tribune. Archived from the original on October 24, 2012. Retrieved July 6, 2017.