File:Sheets of copper from Katanga mines, Belgian Congo.jpg

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Summary

Description	English: Sheets of copper from Katanga mines
Date	1942
Source	http://www.ibiblio.org/hyperwar/UN/Belgium/Congo/ - Belgian Congo at War, published in New York (1942)
Author	Unknown authorUnknown author

Licensing

This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.

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