"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M6NV-L76 : 14 July 2016), Wiley Mc Knight, Greene, Worth, Missouri, United States; citing enumeration district ED 285, sheet 430A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0741; FHL microfilm 1,254,741.