Commercial air transportaion
By: by John H. Frederick ...
Edition: Rev. ed.
Publisher: R. D. Irwin inc.
Published: 1946
Place of publication: Chicago
Language: eng
Number of pages: 791
Subjects: Aeronautics, Commercial -- United States.
Notes: Bibliographical foot-notes. "Bibliographical note":  p. 741-745.
"Revised edition, first printing, August 1946."