Physical standards for airplane pilots (including standards for lighter-than-air pilots) and appendix of reference text
Subtitle: Rev. July 1, 1930
Publisher: U.S. Govt. Print. Off.
Published: 1930
Place of publication: Washington
Language: eng
Number of pages: 33
Subjects: Air pilots
Notes: At head of title: U.S. Department of Commerce. Aeronautics Branch.