Balthasar Pfeifer and his family are recorded on the 1775 census of Beideck in Household No. 53.
- 1775 Census of Beideck (No. 53).
- 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): Bd09, Bd80.