United air service
Subtitle: Hearing before a subcommittee of the Committee on Military Affairs, House of Representatives, Sixty-sixth Congress, second session
Publisher: Govt. Print. Off.
Published: 1921
Place of publication: Washington
Language: eng
Number of pages: 605
Subjects: United States. National Air Service; United States
Notes: Includes index.

Microfilm. New York, N.Y. : Columbia University Libraries, 2003. 1 microfilm reel ; 35 mm. Master negative: 2003-10130-3. No. 3 on a reel of 8 titles.