"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K4XG-D9N : accessed 5 April 2018), Ollie Mamad, Ward 6, Salem, Salem City, Essex, Massachusetts, United States; citing enumeration district (ED)
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K4XG-D9N : accessed 5 April 2018), Ollie Mamad, Ward 6, Salem, Salem City, Essex, Massachusetts, United States; citing enumeration district (ED)
Marital Status: Married; Relation to Head: Head