"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K7HK-8FR : accessed 25 Sep 2012), Olive Trauernicht in household of Fredrick Trauernicht, Ward 28, St. Louis, St. Louis City, St. Louis City, Missouri, United States; citing enumeration district (ED) 96-752, sheet 5A, family 85, NARA digital publication T627, roll 2211.