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Hartwell, Robert (March 1966). "Markets, Technology, and the Structure of Enterprise in the Development of the Eleventh-Century Chinese Iron and Steel Industry". The Journal of Economic History. 26 (1): 54. doi:10.1017/S0022050700061842. ISSN0022-0507. JSTOR2116001. S2CID154556274.
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Hartwell, Robert (March 1966). "Markets, Technology, and the Structure of Enterprise in the Development of the Eleventh-Century Chinese Iron and Steel Industry". The Journal of Economic History. 26 (1): 54. doi:10.1017/S0022050700061842. ISSN0022-0507. JSTOR2116001. S2CID154556274.
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