"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XKVG-BPX : accessed 9 April 2021), Maria C Santos in household of Roque S Santos, Agat, Agat, Guam; citing enumeration district (ED) ED 6, sheet 6B, line 33, family 56, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2629; FHL microfilm 2,342,363.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K4KT-D8T : 6 March 2020), Maria C Santos, Agat, Agat, Guam; citing enumeration district (ED) 2-1, sheet 21A, line 16, family 182, 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 4643.
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