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- [S174] 1900 US Census, Ward 18, Milwaukee, Milwaukee Co., Wisconsin; 157; Sheet 2B; h.16 f.39; Leon 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; Leo Troka; 16 March 2010.
- [S173] 1920 US Census, Ward 13, Milwaukee, Milwaukee Co., Wisconsin; 155; Sheet 6B; h.83 f.129; Leo Troka; 16 March 2010.
- [S189] 1930 US Census, Ward 13, Milwaukee, Milwaukee Co., Wisconsin; 40-157; Sheet 3B; h.15 f.23; Leo Troka; 16 January 2011.
- [S176] Obituary - Milwaukee Journal-Sentinel, Troka, Leo; 15 August 1963; p.3 col.4.
- [S190] 1905 Wisconsin State Census, Leon Troka; Milwaukee, Milwaukee Co., Sheet 7, Family 108.
- [S202] Wisconsin Death Index, 1959-1997, #025078.
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