"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGST-DPC : 29 October 2015), James Kerr in household of Samuel Kerr, Etna Ward 1, Allegheny, Pennsylvania, United States; citing enumeration district (ED) ED 71, sheet 13A, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,375,307.