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Rhode Island, U.S., Indexes to Naturalization Records, 1890-1992
Ancestry.com
Indexes to Naturalization Records for the District Court, 1906-1991, and the U.S. Circuit Court, 1906-1991, Rhode Island; NARA microfilm publication M2084, 23 rolls; NAID: 3506106; Records of District Courts of the United States, Record Group 21; The National Archives at Boston, Massachusetts.