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- [S173] 1920 US Census, Ward 13, Milwaukee, Milwaukee Co., Wisconsin; 155; Sheet 4A; h.52 f.79; Roman Troka; 16 February 2010.
- [S174] 1900 US Census, Ward 18, Milwaukee, Milwaukee Co., Wisconsin; 157; Sheet 2B; h.16 f.39; Roman Troka; 16 March 2010.
Address: 1105 North Water Street
- [S181] 1910 US Census, Ward 13, Milwaukee, Milwaukee Co., Wisconsin; 134; Sheet 7A; h.28 f.125; Roman Troka; 16 March 2010.
- [S190] 1905 Wisconsin State Census, Roman Troka; Milwaukee, Milwaukee Co., Sheet 7, Family 108.
- [S173] 1920 US Census, Ward 13, Milwaukee, Milwaukee Co., Wisconsin; 155; Sheet 4A; h.52 f.79; Roman Trake; 16 February 2010.
- [S199] Social Security Death Index (SSDI), 387-03-6711;Issue State: Wisconsin;Issue Date: Before 1951..
- [S202] Wisconsin Death Index, 1959-1997, #031886.
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