"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M6QL-RY7 : accessed 10 April 2016), John W Jones in household of Mordecai C Jones, New Market, Frederick, Maryland, United States; citing sheet 7B, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,673.
The Church of Jesus Christ of Latter-day Saints, "Ancestral File," database, FamilySearch (https://familysearch.org/ark:/61903/2:1:9HTG-S52 : accessed 2016-04-10), entry for John William Jones.
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