Haifeng Liu, Jianli Chen, Jianjun Mei, Jinbiao Jia, Lei Shi, A view of iron and steel making technology in the Yan region during the Warring States period and the Han dynasty: scientific study of iron objects excavated from Dongheishan site, Hebei province, China, Journal of Archaeological Science, Volume 47, July 2014, Pages 53-63, ISSN 0305-4403
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