Waller-Joos-Stetzler
"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X3MK-XD3 : accessed 13 Mar 2014), Albert Knapp in household of William Knapp, Deer Creek, Tazewell, Illinois, United States; citing enumeration district (ED) 0005, sheet 3A, family 45, NARA microfilm publication T626, roll 562.
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Title "United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X3MK-XD3 : accessed 13 Mar 2014), Albert Knapp in household of William Knapp, Deer Creek, Tazewell, Illinois, United States; citing enumeration district (ED) 0005, sheet 3A, family 45, NARA microfilm publication T626, roll 562. Short Title Albert Knapp in household of William Knapp, "United States Census, 1930" Source ID S541 Linked to (1) Knapp, Albert R