| Notes |
- "United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M4ZT-GF2 : accessed 17 August 2020), Helen K Rosentreter in household of Charles H Rosentreter, Oregon, Clackamas, Oregon, United States; citing ED 55, sheet 5A, line 3, family 119, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1492; FHL microfilm 1,821,492.
- "United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XCS9-Q88 : accessed 31 July 2020), Charles H Rosentreter, Portland (Districts 1-219), Multnomah, Oregon, United States; citing enumeration district (ED) ED 178, sheet 4A, line 42, family 108, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1951; FHL microfilm 2,341,685.
- https://www.ancestry.com/discoveryui-content/view/66640:70762
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