Kaspar Polks [sic], his family, and his siblings are recorded on the 1798 census of Hussenbach in Household No. Hs137.
Kaspar Boleks and his family are recorded on the 1811 census of Hussenbach in Household No. 137.
- 1811 Hussenbach Census (Household No. 137).
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Hs137.