Co-Ordination of Flight Deck Duties on Large Airplanes, by Ralph S. Johnson Chief Test Pilot, United Air Lines, Inc., paper presented before the Society of Automotive Engineers, Los Angeles, California , October 6, 1944

MSA 25, Series 1, Sub-Series 2, File 3, Co-Ordination of Flight Deck Duties on Large Airplanes, by Ralph S. Johnson Chief Test Pilot, United Air Lines, Inc., paper presented before the Society of Automotive Engineers, Los Angeles, California , October 6, 1944, Box: 1, Folder: 2, Item: 3. Ralph S. Johnson papers, MSA 25. Purdue University Archives and Special Collections. https://archives.lib.purdue.edu/repositories/2/archival_objects/5426 Accessed July 16, 2024.

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