"Guam Judicial, Land, Obituaries, and Census Records, 1712-2000," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2SP-25RX : 9 March 2018), Mariano Mafnas Blas, 1974, Hagåtña, Guam; citing La Universidad de Guam, UOG estación Mangilao, Guam (University of Guam, UOG Station Mangilao, Guam); FHL microfilm 4,152,001.