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Helen Sarah Matlock US Social Security Numerical Identification Files (NUMIDENT), 1936-2007
Birthplace is listed as Moundsville, West Virginia, United States, however, census records list Pennsylvania.https://www.familysearch.org/ark:/61903/1:1:6KQX-MMQP

1930 US Census Helen is counted in 2 US Census -
1) April 29, 1930. Helen Mustaitis is living with her grand-aunt, Anna (Mastaitis) Yakukiewicz and her family.in West Brunswick Township, Schuylkill, Pennsylvania, United States. Anna is the aunt of Helen's father, Charles Mustaitis, and the sister of Charles father, John Mastaitis. https://www.familysearch.org/ark:/61903/1:1:XHH3-5SV

2) April 15, 1930: Living with her mother & father in Michigan. https://www.familysearch.org/ark:/61903/1:1:X79P-VPR