"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XCJC-W7B : accessed 19 May 2020), Robert Klamt, Yuba City, Sutter, California, United States; citing enumeration district (ED) ED 11, sheet 7B, line 67, family 180, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 224; FHL microfilm 2,339,959.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K96X-K7V : 23 November 2019), Robert H Klamt, Yuba, Yuba Judicial Township, Sutter, California, United States; citing enumeration district (ED) 51-14B, sheet 1A, line 5, family 2, 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 354.