Okamura, Hidenori, Li, Yuqun, Zheng, Yan
et al. (2014). Yün-kang, the Buddhist Cave-Temples of the Fifth Century A.D. in North China
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Okamura, Hidenori, Li, Yuqun, Zheng, Yan et al. (2014). Yün-kang, the Buddhist Cave-Temples of the Fifth Century A.D. in North China
云岡石窟
. 20