"United States Census, 1850," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MXL2-RSP : accessed 05 Aug 2014), Mina Bahr in household of Carl Bahr, Harris county, part of, Harris, Texas, United States; citing family 591, NARA microfilm publication M432.
"United States Census, 1870," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MXLY-KMJ : accessed 04 Aug 2014), Bertha Zahn in household of Jacob Zahn, Texas, United States; citing p. 42, family 342, NARA microfilm publication M593, FHL microfilm 000553088.
"United States Census, 1880," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MFNJ-8G5 : accessed 04 Aug 2014), Bertha Zhon in household of Jacob Zhon, Precinct 6, Harris, Texas, United States; citing sheet 249D, NARA microfilm publication T9.
"Texas, County Marriage Index, 1837-1977," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/VXGZ-3HB : accessed 05 Aug 2014), Jacob Zahn and Wilhelmine Bahr, 25 Feb 1861; citing p. 108, Harris, Texas; FHL microfilm 25222.
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