"United States Census, 1930," database with images,
FamilySearch (
https://familysearch.org/ark:/61903/1:1:XCFK-LMM : accessed 23 September 2021), Dorothy Van Dam in household of Garrit Van Dam, Downey, Los Angeles, California, United States; citing enumeration district (ED) ED 927, sheet 5B, line 98, family 140, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 126; FHL microfilm 2,339,861.