• Library of Congress

Sitio Web de la Biblioteca del Congreso de los Estados Unidos. - “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.” [inglés]

• Smithsonian Institution

“America's national educational facility with 19 museums, 9 research centers and over 140 affiliate museums around the world.” - Facilidad nacional de Estados Unidos de América con 19 museos, 9 centros de investigación y más de 140 museos afiliados alrededor del mundo. [inglés]

• The National Gallery of Art

“The National Gallery of Art, Washington houses one of the finest collections in the world illustrating major achievements in painting, sculpture, and graphic arts from the Middle Ages to the present.” - La Galería Nacional de Arte, Washington, tiene una de las más selectas colecciones en el mundo ilustrando mayores obras en pintura, escultura y artes gráficas desde la Edad Media hasta el presente. [inglés]

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