popular mechanics magazine 1939

• POPULAR MECHANICS MAGAZINE May 1939 Volume 71 No. 5 (A new era in lighting)

  

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• POPULAR MECHANICS MAGAZINE August 1939 Volume 72 No. 2 (Electric Home of tomorrow)

  

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• POPULAR MECHANICS MAGAZINE October 1939 Volume 72 No. 4 (Heroes of the diving Navy)

  

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• POPULAR MECHANICS MAGAZINE December 1939 Volume 72 No. 6 (How the big guns hit the mark)

  

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• POPULAR MECHANICS MAGAZINE March 1939 Volume 71 No. 3 (Hotels on the wing, Racing the mighty midgets)

  

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• POPULAR MECHANICS MAGAZINE July 1939 Volume 72 No. 1 (Robots help run the world)

  

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