• A to Z Index of the Science Reference Services Web Site(Science Reference Services, Library of Congress)
  
  A to Z Index of the Science Reference Services Web Site (Science Reference Services; Science, Technology, and Business Division; Library of Congress)
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• Ragtime (The Library of Congress Presents Music, Theater and Dance)
  
  Ragtime (Performing Arts Encyclopedia, Library of Congress). Ragtime, a uniquely American, syncopated musical phenomenon, has been a strong presence in musical composition, entertainment, and scholarship for over a century. See, hear, explore and learn!
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• The 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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