"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X9WW-7D1 : accessed 5 June 2016), Balbina Rivera in household of Ceferino Quintana, Daguao, Naguabo, Puerto Rico; citing sheet 13B, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,822,063.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KFVX-2PH : accessed 6 June 2016), Balbina Rivera Y Rosario in household of Ramona Quiñones Y Rivera, Sardinera, Fajardo, Puerto Rico; citing enumeration district (ED) 66-15, sheet 6B, family 109, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 4638.
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"Puerto Rico, Registro Civil, 1805-2001," database with images, FamilySearch (https://familysearch.org/pal:/MM9.3.1/TH-1-11030-53068-41?cc=1682798 : accessed 13 June 2016), Fajardo > Defunciones, 1937-1942 > image 2052 of 2689; oficinas del ciudad, Puerto Rico (city offices, Puerto Rico).
"Puerto Rico, Registro Civil, 1805-2001," database with images, FamilySearch (https://familysearch.org/pal:/MM9.3.1/TH-1-11030-53068-41?cc=1682798 : accessed 13 June 2016), Fajardo > Defunciones, 1937-1942 > image 2052 of 2689; oficinas del ciudad, Puerto Rico (city offices, Puerto Rico).