"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:V19F-15Y : 23 November 2019), Clara M Suhr in household of Hubert P Suhr, Rome Township, Davison, South Dakota, United States; citing enumeration district (ED) 18-19, sheet 1B, line 42, family 10, 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 3853.
