"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZ88-DK8 : accessed 9 September 2015), Monroe Christman, Warren, Herkimer, New York, United States; citing enumeration district 40, sheet 422D, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0838; FHL microfilm 1,254,838.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJLV-W1H : accessed 9 September 2015), Monroe M Christman, Stark, Herkimer, New York, United States; citing sheet 6A, family 144, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,821,115.