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- [S173] 1920 US Census, Ward 13, Milwaukee, Milwaukee Co., Wisconsin; 157; Sheet 22B; H.283 F.443; Mary Gierszewski; 5 February 2010.
- [S189] 1930 US Census, District 152, Milwaukee, Milwaukee Co., Wisconsin.
- [S181] 1910 US Census, Ward 13, Milwaukee, Milwaukee Co., Wisconsin; 133; Sheet 12B; H.176 F.251; Mary Zalewski; 5 February 2010.
- [S174] 1900 US Census, Ward 14, Milwaukee, Milwaukee Co., Wisconsin; 113; Sheet 18A; h.215 f.312; Marianna Zalewski; 1 March 2010.
- [S190] 1905 Wisconsin State Census, Mary Zalewski; Houshold 565, 5th Precint, 13th Ward, Milwaukee, Milwaukee Co., Wisconsin.
- [S232] St. Casimir's Marriage Record, Franciscum Gierszewski & Mariam Zalewska; 22 January 1913.
- [S10] The Zalewski Family Booklet.
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