"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3BH-DNK : accessed 18 August 2017), Etta Calkins in household of William E Calkins, Keya Paha, Pine, Mills & Simpson Precincts, Keya Paha, Nebraska, United States; citing enumeration district (ED) 140, sheet 4A, family 64, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,931.
"Find A Grave Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QK18-39F6 : 11 July 2016), Etta Iona Calkins Evernden, 1964; Burial, Victoria, Capital Regional District, British Columbia, Canada, Royal Oak Burial Park Cemetery; citing record ID 140732639, Find a Grave, http://www.findagrave.com.