"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MP2K-LXL : accessed 20 January 2017), Vera K Ostness in household of Ole H Ostness, River Falls Ward 3, Pierce, Wisconsin, United States; citing enumeration district (ED) ED 145, sheet 18B, family 12, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1732; FHL microfilm 1,375,745.
