• American Memory
  Digital Record of History by Library of Congress
  The home page for the American Memory Historical Collections from the Library of Congress. American Memory provides free access to historical images, maps, sound recordings, and motion pictures that document the American experience. American Memory offers primary source materials that chronicle historical events, people, places, and ideas that continue to shape America.
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• Library of Congress
  
  The Library of Congress. The Library of Congress is the nation's oldest federal cultural institution, and it serves as the research arm of Congress. It is also the largest library in the world, with more than 120 million items. The collections include books, sound recordings, motion pictures, photographs, maps, and manuscripts.
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• Virtual Reference Shelf
  Web Resources compiled by the Library of Congress
  Ask a librarian: An online reference service from the Library of Congress that allows researchers to submit reference questions to Library of Congress reading rooms and receive expert research assistance (within 5 business days.)
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