"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K44L-MK9 : accessed 26 Sep 2012), Ollie Trauernicht, Civil District 13, Davidson, Tennessee, United States; citing enumeration district (ED) 19-49, sheet 4A, family 73, NARA digital publication T627, roll 3886.