| http://www.w3.org/ns/prov#value | - Immigration to the United States, 1789-1930http://ocp.hul.harvard.edu/immigration/From the site:???Immigration to the United States, 1789-1930, is a web-based collection of selected historical materials from Harvard's libraries, archives, and museums that documents voluntary immigration to the US from the signing of the Constitution to the onset of the Great Depression.Immigration has profoundly i
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