"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M3BD-Y6N : accessed 2 March 2015), Sippe Dykstra, Panama Precinct, Lancaster, Nebraska, United States; citing sheet 6A, family 107, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,934.