"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3H2-J4T : accessed 30 November 2018), William A Thacker in household of Daniel H Thacker, Liberty Township (south ahlf), Bollinger, Missouri, United States; citing enumeration district (ED) 5, sheet 6B, family 113, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,839.