"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K7VX-F24 : accessed 22 February 2015), John Andringa, Wilton Town, Monroe, Wisconsin, United States; citing enumeration district (ED) 41-42, sheet 6B, family 100, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 4505.