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* http://arcus-hobby.store/blogs/historical-reference/aircraft-colors-and-camouflage-of-the-us-army-air-force | * http://arcus-hobby.store/blogs/historical-reference/aircraft-colors-and-camouflage-of-the-us-army-air-force | ||
* http://www.enginehistory.org/References/UKNA/2Engines1921-39AIR.htm | * http://www.enginehistory.org/References/UKNA/2Engines1921-39AIR.htm | ||
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'''Non-Aviation References''' | |||
* http://www.usww2uniforms.com | |||
* http://www.med-dept.com | |||
* https://web.archive.org/web/20201128105721/http://www.usarmydatadepot.com | |||
* http://www.qmgrs.com | |||
* http://www.archive.org/details/herberbookercollection | |||
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