"United States Census, 1850," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MF82-T8R : accessed 12 January 2015), Jan Van Den Boogaard, Holland, Ottawa, Michigan, United States; citing family 336, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).