Thập tự chinh Livonia (Vietnamese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Thập tự chinh Livonia" in Vietnamese language version.

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archive.org

Bilmanis, Alfreds (1945). The Church in Latvia. Drauga vēsts. 1215 proclaimed it the Terra Mariana, subject directly.

Urban, William (1981). Livonian Crusade. University Press of America. ISBN 0-8191-1683-1.
Riley-Smith, Jonathan (2005). The Crusades: A History. Continuum International Publishing Group. tr. 161. ISBN 0-8264-7269-9.
Bilmanis, Alfreds (1944). Latvian–Russian Relations: Documents. The Latvian legation.
Herbermann, Charles George (1907). The Catholic Encyclopedia. Robert Appleton Company.