| Notes |
- "Illinois, Cook County Deaths, 1878-1994," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q234-HFTH : 18 March 2018), John Rosentriter in entry for Anna Christine Frietes, 18 Nov 1937; citing Chicago, Cook, Illinois, United States, source reference , record number , Cook County Courthouse, Chicago; FHL microfilm
- "Illinois Deaths and Stillbirths, 1916-1947," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:N34K-MB8 : 10 March 2018), John Rosentriter in entry for Anna Christine Frieter, 18 Nov 1937; Public Board of Health, Archives, Springfield; FHL microfilm 1,953,271
- "Wisconsin, County Marriages, 1836-1911," database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:QK8P-TVH2 : 26 May 2020), Kate Wiskerchen in entry for Chas Freitas and Annie Rosentreter, 1 Aug 1897; citing Milwaukee, Wisconsin, United States, Wisconsin Historical Society, Madison; FHL microfilm 1,292,308.
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