"United States Census, 1900," database with images, FamilySearch (
https://familysearch.org/ark:/61903/1:1:M9L9-TRS : accessed 31 January 2016), Earl S Hudler in household of D M Hudler, Muscatine Township Muscatine city Ward 1, Muscatine, Iowa, United States; citing sheet 8A, family 191, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,450.