"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K9MM-6PQ : accessed 25 Sep 2012), Menn Trauernicht, Island Grove Township, Gage, Nebraska, United States; citing enumeration district (ED) 34-34, sheet 1A, family 7, NARA digital publication T627, roll 2247.