"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K4P1-HX1 : accessed 10 Oct 2013), Hannah Bush in household of William Bush, Midland Park Borough, Bergen, New Jersey, United States; citing enumeration district (ED) 2-233, sheet 4B, family 94, NARA digital publication of T627, roll 2311.