"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K4JW-WHJ : accessed 30 Sep 2014), Louis V Wiersma, Mendon Town, Worcester, Massachusetts, United States; citing enumeration district (ED) 14-184, sheet 2A, family 18, NARA digital publication of T627, roll 1652.