古列尔莫二世 (西西里) (Chinese Wikipedia)
Analysis of information sources in references of the Wikipedia article "古列尔莫二世 (西西里)" in Chinese language version.
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Chinese rank
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- 此句或之前多句包含来自公有领域出版物的文本: Curtis, Edmund. William II. of Sicily. Chisholm, Hugh (编). Encyclopædia Britannica 28 (第11版). London: Cambridge University Press: 671. 1911.
