"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MM2N-RTM : accessed 27 February 2015), Katie S Kass in household of William Kass, Trempealeau town Trempealeau village, Trempealeau, Wisconsin, United States; citing sheet 10B, family 221, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,241,819.