The 1930 Census appears to show my mother (age 17 at the time) and her parents as naturalized citizens.  What confuses me is a Petition for Naturalization [of a Married Person, under Sec. 310(a) or (b). 322 or 312 of the Nationality Act of 1940 (S4 Stat. 1144-1145] for my grandmother from 1941. (US District Court, Newark NJ)  Upon further reading it states that she was naturalized on May 28, 1924. I don't understand why she had to petition again.