Official Documents on the Formation of the USSR

Kalinin, Mikhail Ivanovich (1875-1946).To the twentieth anniversary of the education of the USSR.Moscow: State Publishing House of Political Literature, 1942.

Don military Vedomosti.The part is official.1868. No. 23. - 1868. -Act of acceptance of microfilms for digitization of January 31, 2020.Electronic copy source: PB