Papal Letters on the Collision between the Cumans and the Teutons in the beginning of the 13th Century von R. Khautala

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The Mongol Expansion and Fifth Crusade according to the Latin Sources of 1221 von R. Khautala

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The Franciscan Missionary Reports about Nomadic Islamization in the Early Reign of Uzbek Khan von R. Khautala

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Catholic missionaries in the Mongol empire (13th–14th centuries) von R. Khautala

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