↑ "United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2KG-4NL : accessed 12 March 2022), Bessie Sostek in household of Samuel Sostek, Boston Ward 9, Suffolk, Massachusetts, United States; citing enumeration district (ED) ED 1984, sheet 22B, family 412, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 617; FHL microfilm 1,374,630.