"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K4L1-6LH : accessed 20 Oct 2014), Ruth L Poisson in household of John Poisson, Ward 2, East Grand Rapids, East Grand Rapids City, Kent, Michigan, United States; citing enumeration district (ED) 41-13, sheet 10B, family 195, NARA digital publication of T627, roll 1774.