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- [S9322] 1920 United States Federal Census, Year: 1920; Census Place: Derby Ward 1, New Haven, Connecticut; Roll: T625_189; Page: 16B; Enumeration District: 254.
- [S9389] 1910 United States Federal Census, Year: 1910; Census Place: Derby Ward 1, New Haven, Connecticut; Roll: T624_136; Page: 21A; Enumeration District: 0333; FHL microfilm: 1374149.
- [S9318] 1930 United States Federal Census, Year: 1930; Census Place: Derby, New Haven, Connecticut; Page: 6A; Enumeration District: 0124; FHL microfilm: 2340007.
- [S9305] Connecticut, U.S., Death Index, 1917-2017.
- [S9282] 1940 United States Federal Census, Year: 1940; Census Place: Derby, New Haven, Connecticut; Roll: m-t0627-00515; Page: 15B; Enumeration District: 5-31.
- [S16] New York, U.S., Passenger and Crew Lists (including Castle Garden and Ellis Island), 1820-1957, Year: 1903; Arrival: New York, New York; Microfilm Serial: T715, 1897-1957; Microfilm Roll: Roll 0377; Line: 11; Page Number: 88.
- [S9308] U.S., City Directories, 1822-1995.
- [S239] Majdan Marriages, 1854-1901 (Majdan Królewski), year 1901, act 7; Karol Trela and Rozalia Barnaś marriage.
- [S9306] Web: Connecticut, U.S., Marriage Records, 1897-1968, Connecticut State Department of Health; Hartford, CT; Connecticut Vital Records — Index of Marriages, 1897-1968.
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