Datei:Tiangong Kaiwu Coal Mining.gif

An illustration of Chinese coal miners from the Tiangong Kaiwu encyclopedia, published in 1637 by the Ming Dynasty encyclopedist Song Yingxing (1587-1666). This illustration can be found on page 204 of E-tu Zen Sun and Shiou-Chuan Sun's English translation of the Tiangong Kaiwu (Pennsylvania State University Press, 1966).

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http://sts.nthu.edu.tw/mengxi/story08.html

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