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APA ZitierstilRadinš, A. (2006). The area populated by the Latgallians and the shifting of its northern boundary in the 7th-13th century: Latgalite asuala ja selle pöhjapiri nihkumine 7.-13. sajandil. Tartu-Tallinn: Ajaloo Instituut.
Chicago ZitierstilRadinš, Arnis. The Area Populated By the Latgallians and the Shifting of Its Northern Boundary in the 7th-13th Century: Latgalite Asuala Ja Selle Pöhjapiri Nihkumine 7.-13. Sajandil. Tartu-Tallinn: Ajaloo Instituut, 2006.
MLA ZitierstilRadinš, Arnis. The Area Populated By the Latgallians and the Shifting of Its Northern Boundary in the 7th-13th Century: Latgalite Asuala Ja Selle Pöhjapiri Nihkumine 7.-13. Sajandil. Tartu-Tallinn: Ajaloo Instituut, 2006.