"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XHF6-FWM : accessed 06 Jun 2014), William H Jeffries in household of George W Jeffries, Kansas City, Jackson, Missouri, United States; citing enumeration district (ED) 0226, sheet 26A, family 489, NARA microfilm publication T626, roll 1202.
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K74D-HY8 : accessed 06 Jun 2014), William Jeffries in household of William Jeffries, Ward 15, Kansas City, Kaw Township, Jackson, Missouri, United States; citing enumeration district (ED) 116-310, sheet 9B, family 227, NARA digital publication of T627, roll 2179.
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