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jstor.org
Cullen, Christopher (1990). "The Science/Technology Interface in Seventeenth-Century China: Song Yingxing 宋 應 星 on "qi" 氣 and the "wu xing" 五 行". Bulletin of the School of Oriental and African Studies, University of London. 53 (2): 295–318. doi:10.1017/S0041977X00026100. JSTOR619236. S2CID161299595.
semanticscholar.org
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wdl.org
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