"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZ4F-P65 : 9 November 2014), Prudence Mullins in household of Wiley Mullins, Marion county, part of, Marion, Iowa, United States; citing family 49, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
