The widow and children of Georg Bickel are recorded on the 1798 census of Biberstein in Household No. Bb34. They are recorded on the 1834 census of Biberstein in Household No. 88.
- 1834 Biberstein Census (Household No. 88).
- 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): Bb34.