Dzenis, Agris. “SOCIOETHNIC GROUPS OF LATGALE IN 16-18th CENTURIES ACCORDING TO RĒZEKNE DISTRICT INVENTORY AND SOUL AUDIT DATA”. Via Latgalica, no. 10 (November 30, 2017): 22–27. Accessed May 4, 2024. https://journals.rta.lv/index.php/LATG/article/view/2771.