Readings on the history of the Middle and Lower Volga Region / Prof. N.N. Firsov. - Kazan: Publishing house Chuvash. ord. with Nar. com. on affairs of nationalities, 1919. -
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Source of the electronic copy: PB
Issue. 1. - 1919. -60 s .. - Bibliograf. in a substring. note. and at the end of the text.
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