"United States Census, 1860," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MW63-PDH : accessed 29 Nov 2014), Theodore Teenstra in household of Daniel Ball, First Ward Grand Rapids City, Kent, Michigan, United States; from "1860 U.S. Federal Census - Population," Fold3.com; p. 2, household ID 16, NARA microfilm publication M653; NARA microfilm publication M653. National Archives and Records Administration, Washington, D.C.; FHL microfilm 803550.