"United States Census, 1860," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MHZD-LQN : accessed 26 January 2015), Anna Balkstra in household of John Balkstra, 2d Ward City St Louis, St. Louis, Missouri, United States; from "1860 U.S. Federal Census - Population," Fold3.com; citing p. 333, household ID 3091, NARA microfilm publication M653, National Archives and Records Administration, Washington, D.C.; FHL microfilm 803,648.