| Notes |
- "Deutschland, Preußen, Brandenburg und Posen, Kirchenbuchduplikate, 1794-1874," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:JQHC-G44 : 11 March 2020), Sabine Justine Rosentreter in entry for Otto Herrmann Gustav, 6 Oct 1872; citing Baptism, Keller, Lindow, Ruppin, Brandenburg, Deutschland, p. , Brandenburgisches Landeshauptarchiv (Brandenburg State Archives), Potsdam; FHL microfilm 1,334,650.
- https://www.ancestry.com/imageviewer/collections/2116/images/4110214_00383
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