Image: Hudunpao-wujingzongyao
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Description: The hu dun pao in the Wujing Zongyao
Title: Hudunpao-wujingzongyao
Credit: 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
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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