"Ohio, County Marriages, 1789-1997," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XZYG-ZXP : accessed 25 Jul 2014), Clinton J Parker and Clara H Opper, 28 Dec 1911; citing Erie, Ohio, United States, reference bk14 pg181 cn1551; FHL microfilm 954133.
"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MDPS-4DG : accessed 25 Jul 2014), Clara H Parker in household of Clinton J Parker, Margaretta, Erie, Ohio, United States; citing sheet 3B, family 69, NARA microfilm publication T625, FHL microfilm 1821378.
"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X4QL-46C : accessed 25 Jul 2014), Clara Parker in household of C J Parker, Margaretta, Erie, Ohio, United States; citing enumeration district (ED) 0027, sheet 10A, family 128, NARA microfilm publication T626, roll 1791.
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KWXQ-TMT : accessed 25 Jul 2014), Clara Parker in household of Clinton Parker, Margaretta Township, Erie, Ohio, United States; citing enumeration district (ED) 22-10A, sheet 3A, family 51, NARA digital publication of T627, roll 3063.
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