Note on listening apparatus for aircraft, made by Military Telegraph Service.

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Bibliographic Details
Online Access:	Full Text (via ProQuest)
Corporate Author:	United States. War Plans Division
Format:	Government Document eBook
Language:	English
Published:	Washington : U.S. GPO, 1917.
Series:	War Dept. Doc. No. 700.
Subjects:	United States. > War Plans Division. Airplanes, Military. Aeronautics, Military. Military intelligence.

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Full Text (via ProQuest)

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Call Number:	W26.2-60
W26.2-60	Available