||Library of Congress
||Contains " approximately 12 million records representing books, serials, computer files, manuscripts, cartographic materials, music, sound recordings, and visualmaterials. The Catalog also displays searching aids for users, such as cross-references and scope notes. The catalog records reside in a single integrated database; they are not separated according to type of material, language of material, date of cataloging, or processing/circulation status."
April 6, 2011