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- [S241] Majdan Births, 1865-1891 (Majdan Królewski), year 1879, act 35; Bartłomiej Babula birth and baptism.
- [S9389] 1910 United States Federal Census, Year: 1910; Census Place: Brooklyn Ward 26, Kings, New York; Roll: T624_976; Page: 1b; Enumeration District: 0748; FHL microfilm: 1374989.
- [S9322] 1920 United States Federal Census, Year: 1920; Census Place: Brooklyn Assembly District 22, Kings, New York; Roll: T625_1181; Page: 5B; Enumeration District: 1448.
- [S9416] New York, U.S., State Census, 1925, New York State Archives; Albany, New York; State Population Census Schedules, 1925; Election District: 51; Assembly District: 22; City: Brooklyn; County: Kings; Page: 13.
- [S587] New York, U.S., State and Federal Naturalization Records, 1794-1943, The National Archives in Washington, DC; Washington, DC; NAI Title: Index to Petitions For Naturalizations Filed in Federal, State, and Local Courts in New York City, 1792-1906; NAI Number: 5700802; Record Group Title: Records of District Courts of the United States, 1685-2009; Record Group Number: Rg 21.
- [S9318] 1930 United States Federal Census, Year: 1930; Census Place: Brooklyn, Kings, New York; Page: 3B; Enumeration District: 0524; FHL microfilm: 2341277.
- [S9282] 1940 United States Federal Census, Year: 1940; Census Place: New York, Kings, New York; Roll: m-t0627-02618; Page: 4A; Enumeration District: 24-2704.
- [S239] Majdan Marriages, 1854-1901 (Majdan Królewski), year 1862, act 10; Wojciech Babula and Ewa Barnaś marriage.
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