"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMYR-613 : accessed 23 March 2020), Kate Keller in household of Nathan Keller, Houston Township Gaylord city, Smith, Kansas, United States; citing enumeration district (ED) 169, sheet 2A, family 28, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,501.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2HB-F3W : accessed 23 March 2020), Katie Keller in household of Nathan E Keller, Coldwater, Comanche, Kansas, United States; citing enumeration district (ED) ED 29, sheet 1A, family 4, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 435; FHL microfilm 1,374,448.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MFXL-N34 : accessed 23 March 2020), Katherine Keller in household of Nathaniel E Keller, Lane, Smith, Kansas, United States; citing ED 219, sheet 6B, line 93, family 28, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 552; FHL microfilm 1,820,552.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VR2X-6NY : 9 February 2020), Katie Keller in household of Nathan E Keller, Athol, Lane Township, Smith, Kansas, United States; citing enumeration district (ED) 92-17, sheet 2A, line 34, family 40, 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 1262.
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