"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9VL-S5L : accessed 7 February 2017), Ole M Slapgaard in household of Hans A Slapgaard, Bear Creek, Ft. Ransom & Preston Townships, Ransom, North Dakota, United States; citing enumeration district (ED) 128, sheet 2B, family 96, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,231.
