TransliterationFirsov N. A. Inorodcheskoe naselenie prezhnego Kazanskogo tsarstva v novoy Rossii do 1762 g. i kolonizatsiya zakamskikh zemel. Uchenye zapiski Imperatorskogo Kazanskogo Universiteta. 1870. Tom VI.
In EnglishFirsov N. A. Foreign population of the former Kazan Kingdom in the new Russia until 1762 and colonization of the Zakamian lands. Academic notes of Imperial Kazan University. 1870. Volume VI. In Russian (ask us if in doubt).
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