| Notes |
- "Illinois, Cook County, Birth Certificates, 1871-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q239-R7LM : 18 May 2016), Harriet Lechert in entry for Irene M Rosentreter, 09 Aug 1909; Chicago, Cook, Illinois, United States, reference/certificate 204593, Cook County Clerk, Cook County Courthouse, Chicago; FHL microfilm .
- "Illinois, Chicago, Catholic Church Records, 1833-1925," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVMN-G8FJ : 9 March 2018), Irena Marya Rosentreter, Baptism 15 Aug 1909; citing Catholic Church parishes, Chicago Diocese, Chicago; FHL microfilm 1,703,798.
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