Principal parts of airplane engines
By: Prepared by the Air Service. August, 1919.
Contributors: United States. Adjutant-General's Office.
Publisher: Govt. Print. Off.
Published: 1919
Place of publication: Washington
Language: eng
Number of pages: 17
Subjects: Airplanes -- Motors
Notes: On p. 2:  War Dept.: Document no. 939.  Office of the Adjutant General.