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Our answer to air raiders : photodiagram
Diagram demonstrates how an anti-aircraft gun operates in conjunction with an altitude finder and a director that automatically calculates firing data.
20.5 x 21.5 cm
black and white
- 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 (September 4, 1938), p. 3