"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZGJ-R55 : 12 April 2016), Barbara Nace in household of F B Lutman, Pennsylvania, United States; citing p. 9, family 69, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,834.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWF9-NJF : 15 July 2017), Barbra Nace in entry for Henry Nace, 1880; citing enumeration district ED 78, sheet 72B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d), roll 1123; FHL microfilm 1,255,123.