"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KS2D-99V : accessed 3 April 2015), Joseph Donat in household of Frank J Donat, Eden Prairie Township, Hennepin, Minnesota, United States; citing enumeration district (ED) 27-11, sheet 2A, family 23, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 1924.
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