Source: S2 "United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:J1B4-D61 : 19 May 2014), Clara Mundo, Sep 1987; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
Source: S3 "United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XC6D-2KG : accessed 22 January 2018), Arthur L Mundo, San Diego, San Diego, California, United States; citing enumeration district (ED) ED 54, sheet 7B, line 94, family 206, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 191; FHL microfilm 2,339,926.
Source: S4 "District of Columbia Marriages, 1830-1921," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F7BN-NZH : 6 December 2014), Arthur L. Mundo and Clara E. Jacob, 08 Jul 1920; citing District Of Columbia, reference p 274; FHL microfilm 2,129,774.
Source: S5 "HISTORICAL NOMINATION of the Minnie Scheibe / Bathrick Brothers Speculation House 3244 Dumas Street ~ Loma Portal Neighborhood San Diego, California" 
Source: S6 Evening Tribune (San Diego, CA) - Thursday, September 17, 1987, Page: B-4. News Bank Inc.
Source: S23 "Marriage Licenses" published by The Washington Herald., July 09, 1920, Page 6, Image 6 
Source: S24 "Christmas Party Monday for Children of O.E.S.; New Patrons of County Meet for Dinner Party" Coronado Eagle and Journal, Number 52, 29 December 1938 
Source: S25 "Married" Army-Navy-Air Force Register and Defense Times, Volume 68, 24 July 1920, page 107 
Thank you to Elizabeth x for creating WikiTree profile Jacob-725 through the import of Mundo.ged on May 3, 2013. Click to the Changes page for the details of edits by Elizabeth and others.