"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K7W4-26K : 23 December 2019), Donald Alfred Summa in household of Andrew A Summa, Gravois Township, St. Louis, St. Louis, Missouri, United States; citing enumeration district (ED) 95-135, sheet 3B, line 53, family 58, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 2150.