File:Curtiss NC-4 Four Engine Configuration-detail.jpg
Licensing
Source: USN photo Scanned from Page 260 of the following book.
- Burgess, Richard R. (2001) U.S. Naval Aviation, Levin, Hugh Lauter Associates, pp. 352pp Page 4, last line: “All photography and illustrations are courtesy of the U.S. Navy unless otherwise credited.
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This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: scanned at 600dpi, 1PX gaussian blur to remove printers halftone dots, then resized down 80%, then sharpenned.. Modifications made by Makthorpe.
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