"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3HV-PMC : 20 January 2015), Oliver J Armstrong in household of Thomas Armstrong, Grand River & Mingo Townships, Bates, Missouri, United States; citing sheet 10A, family 178, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,839.
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