Sweetser, 1919, The American Air Service
From Inventing aviation
- Arthur Sweetser. The American Air Service: A Record of its Problems, its Difficulties, its Failures, and its Final Achievements. Introduction by Newton D. Baker, Secretary of War. New York & London: D. Appleton and Company, 1919.
PDF available online at the Internet Archive.
Royalties devoted to American Red Cross.
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