"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X47R-QD9 : accessed 28 Jun 2014), Charles Guggenhine in household of Jack Guggenhine, Cincinnati (Districts 1-250), Hamilton, Ohio, United States; citing enumeration district (ED) 0147, sheet 3B, family 57, NARA microfilm publication T626, roll 1811.
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KWPJ-MZQ : accessed 28 Jun 2014), Charles Guggenheim in household of Jack Guggenheim, Ward 13, Cincinnati City, Cincinnati City, Hamilton, Ohio, United States; citing enumeration district (ED) 91-209, sheet 61A, family 31, NARA digital publication of T627, roll 3194.
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