Census

        First General Census of the Russian Empire in 1897. 7: Vologda Province. tetras. 2 (last).
[St. Petersburg]: publication of the Central Statistical Committee of the Ministry of Internal Affairs, 1899-1905. 1904.

РНБ

Results of the All-Union Population Census of 1928 Ust-Sysolsk: B. and., 1928.

НБР Коми