"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9SH-H72 : accessed 12 July 2015), Garret H Elfrink, York Township, Fillmore, Minnesota, United States; citing sheet 2A, family 29, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,763.