Waller-Joos-Stetzler
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KWR8-N1G : accessed 17 February 2016), Florence Jackson in household of David E Jackson, Ward 3, Bloomington, Bloomington City Township, McLean, Illinois, United States; citing enumeration district (ED) 57-20, sheet 13B, family 291, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 841.
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Title "United States Census, 1940," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KWR8-N1G : accessed 17 February 2016), Florence Jackson in household of David E Jackson, Ward 3, Bloomington, Bloomington City Township, McLean, Illinois, United States; citing enumeration district (ED) 57-20, sheet 13B, family 291, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 841. Short Title Florence Jackson in household of David E Jackson, "United States Census, 1940" Source ID S2665 Linked to (1) Family: Jackson, David Earl / Jones, Florence Sallie