"United States Census, 1940," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:KWLZ-67P : 9 January 2021), Donna S Harper in household of Frederick H Harper, Mansfield, Richland, Ohio, United States; citing enumeration district (ED) 70-21, sheet 61A, line 4, family 30, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 3134.
"Ohio Deaths, 1908-1953," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XZV1-L9Z : 8 March 2021), Fred Harper in entry for Donna Grace Harper, 27 Jan 1941; citing Mansfield, Richland, Ohio, reference fn 6122; FHL microfilm 2,023,891.
Find a Grave, database and images (https://www.findagrave.com/memorial/234371756/donna-grace-harper : accessed 27 November 2021), memorial page for Donna Grace Harper (21 Mar 1935–27 Jan 1941), Find a Grave Memorial ID 234371756, citing Union Cemetery, Uhrichsville, Tuscarawas County, Ohio, USA ; Maintained by Michael Milliken (contributor 33120843) .
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