Peter Freiberg and his family are recorded on the 1798 census of Meinhard in Household No. Mn02.
Peter's descendants are recorded on the 1834 census of Meinhard in Household No. 8.
- 1834 Meinhard Census (Household No. 8).
- 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): Mn02.