Commercial air transportation - Frederick, John H. (John Hutchinson), 1896- (Chicago : R.D. Irwin Inc., 1946)
"Revised edition, first printing, August 1946."
Includes bibliographical references and index.
Microfilm.
Filmed
Master negative: 96-83462-1.
No. 1 on a reel of 16 titles.
Keywords: Aeronautics, Commercial -- United States