"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MPB4-XS2 : accessed 20 April 2016), Martinez Alexander in household of Joseph K Alexander, Police Jury Ward 5, St Martin, Louisiana, United States; citing enumeration district (ED) ED 132, sheet 46B, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,543.