Wu 1950, p. 492. Wu, K. T. (1950). "Chinese Printing under Four Alien Dynasties: (916-1368 A. D.)". Harvard Journal of Asiatic Studies. 13 (3/4): 447–523. doi:10.2307/2718064. ISSN0073-0548. JSTOR2718064.
jstor.org
Wu 1950, p. 492. Wu, K. T. (1950). "Chinese Printing under Four Alien Dynasties: (916-1368 A. D.)". Harvard Journal of Asiatic Studies. 13 (3/4): 447–523. doi:10.2307/2718064. ISSN0073-0548. JSTOR2718064.
worldcat.org
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Wu 1950, p. 492. Wu, K. T. (1950). "Chinese Printing under Four Alien Dynasties: (916-1368 A. D.)". Harvard Journal of Asiatic Studies. 13 (3/4): 447–523. doi:10.2307/2718064. ISSN0073-0548. JSTOR2718064.