TransliterationRot K., Devis G., Dzhayl's G.A. Istoriya khristianskikh gosudarstv Balkanskogo poluostrova: Srednevekovaya Evropa: Kitay i ego zhizn'.
In EnglishRoth K., Davis G., Giles G. A. History of the Christian States of the Balkans: Medieval Europe: China and its Life. In Russian (ask us if in doubt).
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