"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XSBZ-CYF : accessed 16 April 2018), James T Davis, Libertyville, Lake, Illinois, United States; citing enumeration district (ED)ED 51, sheet 18B, line 98, family 423, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 529; FHL microfilm 2,340,264.