- [S24] 1910 U.S. Census, "United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:ML4B-7JJ : accessed 27 November 2020), Elizabeth H Kreifels in household of Louie Kreifels, Rock Creek, Otoe, Nebraska, United States; citing enumeration district (ED) ED 142, sheet 5B, family 89, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 852; FHL microfilm 1,374,865.
- [S26] 1920 U.S. Census, "United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MCKL-MZG : accessed 29 November 2020), Louis Kreibels, Rock Creek, Otoe, Nebraska, United States; citing ED 137, sheet 6A, line 22, family 116, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 997; FHL microfilm 1,820,997.
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