| Notes |
- "Massachusetts State Vital Records, 1841-1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QLGY-8TBW : 26 November 2019), Gustave Rudolph Rosentreter and Catherine Regan, 08 Nov 1919; citing Marriage, Webster, Webster, Worcester, Massachusetts, United States, certificate number , page , State Archives, Boston.
- "United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MF9T-Y8G : accessed 17 August 2020), Katherine Rosentreter in household of Rudolph Rosentreter, Webster, Worcester, Massachusetts, United States; citing ED 175, sheet 1A, line 14, family 6, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 749; FHL microfilm 1,820,749.
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