The widow and son of Kaspar Volk are recorded on the 1798 census of Nieder-Monjou in Household No. Nm53.
Jakob Volk, son of Kaspar Volk, and his family are recorded on the 1834 census of Nieder-Monjou in Household No. 14.
- 1834 Nieder-Monjou Census (Household No. 14).
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga: Economy, Population, and Agriculture (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Nm53.