In the parish records of Fränkisch-Crumbach, Johannes Becker from Wersau (4 kilometers north of Fränkisch-Crumbach, and his wife (née Eidemüller) are included in a list of immigrants. They arrived in Bauer on 20 July 1766 and are listed there on the 1767 Census in Household No. 34.
- Mai, Brent Alan and Dona Reeves-Marquardt, German Migration to the Russian Volga (1764-1767) (Lincoln, NE: American Historical Society of Germans from Russia, 2003).
- Parish records of Fränkisch-Crumbach.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 124.