| Sources |
- [S9389] 1910 United States Federal Census, Year: 1910; Census Place: Minneapolis Ward 1, Hennepin, Minnesota; Roll: T624_700; Page: 7B; Enumeration District: 0026; FHL microfilm: 1374713.
- [S9282] 1940 United States Federal Census, Year: 1940; Census Place: Columbia Heights, Anoka, Minnesota; Roll: m-t0627-01904; Page: 25B; Enumeration District: 2-13.
- [S364] Trześń Births, 1890-1909 (Trześń), year 1891, act 30; Wawrzyniec Wąsik birth and baptism.
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The National Archives at Washington, D.C.; Washington, D.C.; Manifests of Passengers Arriving at St. Albans, VT, District through Canadian Pacific and Atlantic Ports, 1895-1954; Record Group Title: Records of the Immigration and Naturalization Service, 17
- [S9470] Canada, Incoming Passenger Lists, 1865-1935, Library and Archives Canada; Ottawa, Ontario, Canada; Series: RG 76-C; Roll: T-506.
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- [S9116] U.S., World War I Draft Registration Cards, 1917-1918, Registration State: Minnesota; Registration County: Hennepin; Roll: 1675521; Draft Board: 01.
- [S9322] 1920 United States Federal Census, Year: 1920; Census Place: Minneapolis Ward 1, Hennepin, Minnesota; Roll: T625_832; Page: 11A; Enumeration District: 25.
- [S9308] U.S., City Directories, 1822-1995.
- [S9318] 1930 United States Federal Census, Year: 1930; Census Place: Minneapolis, Hennepin, Minnesota; Page: 8B; Enumeration District: 0001; FHL microfilm: 2340824.
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The National Archives at St. Louis; St. Louis, Missouri; World War II Draft Cards (Fourth Registration) for the State of Minnesota; Record Group Title: Records of the Selective Service System, 1926-1975; Record Group Number: 147; Box or Roll Number: 736
- [S9114] 1950 United States Federal Census, United States of America, Bureau of the Census; Washington, D.C.; Seventeenth Census of the United States, 1950; Record Group: Records of the Bureau of the Census, 1790-2007; Record Group Number: 29; Residence Date: 1950; Home in 1950: Columbia Heights, Anoka, Minnesota; Roll: 4238; Sheet Number: 14; Enumeration District: 2-27.
- [S9374] Minnesota, U.S., Death Index, 1908-2017.
- [S9374] Minnesota, U.S., Death Index, 1908-2017, Minnesota Department of Health; St Paul, Minnesota, USA; Minnesota, Death Index, 1908-2017.
- [S9072] U.S., Find a Grave® Index, 1600s-Current.
- [S5] Brzostowa Góra Marriages, 1866-1922 (Majdan Królewski), marriage of Mathias Wasik and Eva Kopec; page 35, entry no 10; Mathias Wasik and Eva Kopec (1890).
- [S9469] Minnesota, U.S., Marriages Index, 1849-1950.
- [S9539] Web: Minnesota, U.S., Marriages from the Minnesota Official Marriage System, 1850-2022, Minnesota Association of County Officers; Saint Paul, Minnesota; Minnesota Official Marriage System.
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