希普卡山口 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "希普卡山口" in Chinese language version.

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archive.org

Crowe, John Henry Verrinder. Shipka Pass. The Encyclopaedia Britannica; A Dictionary of Arts, Sciences, Literature and General Information. XXIV (SAINTE-CLAIRE DEVILLE to SHUTTLE) 11th. Cambridge, England and New York: At the University Press. 1911: 981–982 [18 July 2018] –通过Internet Archive.