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Predatory war birds
Painting of a squadron of United States Northrop A-17 airplanes flying low to the ground.
18.4 x 36.5 cm
- A-17 (Bomber)
- Fighter planes--American--1930-1940
- Northrop Aircraft, Inc.--Products--United States--1930-1940
- United States. Army. Air Corps--Equipment & supplies--1930-1940
- still image
- These materials are either in the public domain, according to U.S. copyright law, or permission has been obtained from rights owners. The digital version and supplementary materials are available for all educational uses worldwide.
- The Janet A. Ginsburg Chicago Tribune Image Collection
- Chicago Sunday Tribune (April 18, 1937), Graphic Section, p. 1