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English: The hu dun pao in the Wujing Zongyao
Date
Source

Ming dynasty version of en:Wujing Zongyao

Immediate source: Science and Civilisation in China. Volume 5. Chemistry and Chemical Technology. Part 7. Military Technology: The Gunpowder Epic by Joseph Needham. page 278
Author Zeng Gongliang, Ding Du and Yang Weide

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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.


This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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current05:13, 21 July 2016Thumbnail for version as of 05:13, 21 July 2016400 × 581 (168 KB)Underbar dkUser created page with UploadWizard

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