Waller-Joos-Stetzler
"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MJCT-L5V : accessed 2 January 2015), Christ W Knapp in household of Wm M Knapp, Deer Creek, Tazewell, Illinois, United States; citing sheet 5B, family 91, NARA microfilm publication T625, National Archives and Records Administration, Washington D.C.; FHL microfilm 1,820,410.
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Title "United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MJCT-L5V : accessed 2 January 2015), Christ W Knapp in household of Wm M Knapp, Deer Creek, Tazewell, Illinois, United States; citing sheet 5B, family 91, NARA microfilm publication T625, National Archives and Records Administration, Washington D.C.; FHL microfilm 1,820,410. Short Title Christ W Knapp in household of Wm M Knapp, "United States Census, 1920" Source ID S1989 Linked to (1) Knapp, Chris W