"United States Census, 1930". FamilySearch. Retrieved 15 August 2015. Elizabeth B Riddle in household of James M Riddle, Chicago (Districts 0751-1000), Cook, Illinois, United States; citing enumeration district (ED) 0765, sheet 12A, family 145, line 4, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 449; FHL microfilm 2,340,184.