Waller-Joos-Stetzler
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KWTD-424 : accessed 12 Mar 2014), George Knapp in household of William Joos, Montgomery Township, Woodford, Illinois, United States; citing enumeration district (ED) 102-17, sheet 2A, family 25, NARA digital publication of T627, roll 916.
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Title "United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KWTD-424 : accessed 12 Mar 2014), George Knapp in household of William Joos, Montgomery Township, Woodford, Illinois, United States; citing enumeration district (ED) 102-17, sheet 2A, family 25, NARA digital publication of T627, roll 916. Short Title George Knapp in household of William Joos, "United States Census, 1940" Source ID S511 Linked to (1) Knapp, George Carl