At the National Archives you will find copies of all citizenship applications. Library The Rhode Island Historical Society 121 Hope Street Providence, Rhode Island 02906 Passenger Lists for the Port of Providence are available here. The Cape Verdean collection here is the most extensive collection of general information on Cape Verdeans in the United States. It is another good starting point for someone getting started in genealogy. There are back issues of Cape Verdean community newspapers here.
Obituaries are a great source of family information.
This organization does not keep records of Cape Verdean Genealogy. However, the history of the Portuguese and the Cape Verdeans in America is so intertwined that their records can in fact be useful, especially cemetery records.