"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KQW8-F2Y : accessed 27 Jul 2014), Lewis Marcus, Ward 14, Pittsburgh, Pittsburgh City, Allegheny, Pennsylvania, United States; citing enumeration district (ED) 69-401, sheet 6A, family 245, NARA digital publication of T627, roll 3663.
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