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Archival records related to the federal censuses are available through the National Archives.
Census Materials in the Rutgers University Libraries
Rutgers University Libraries maintain a relatively complete collection of Federal census materials beginning with the 1790 census. The most complete collection is located at Alexander Library (New Brunswick), but additional copies of some materials may be found at the Dana Library (Newark), the Robeson Library (Camden), and other locations. Much of the material is also available online.