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- United States47,311
- Geological Survey (U.S.)36,989
- United States. National Aeronautics and Space Administration24,935
- Yale University, degree granting institution19,855
- United States. Bureau of the Census12,454
- Walter L. Pforzheimer Intelligence Collection (Beinecke Rare Book and Manuscript Library)9,671
- Mozart, Wolfgang Amadeus, 1756-17918,369
- Langley Research Center7,770
- Bach, Johann Sebastian, 1685-17507,754
- Christie, Manson & Woods7,372
- U.S. Atomic Energy Commission6,819
- Beethoven, Ludwig van, 1770-18276,756
- United States. Department of State6,641
- Shakespeare, William, 1564-16166,505
- Riewert Tode Collection of German Student Movements and Counter-Culture6,384
- United States. War Department6,081
- United States. Congress. House. Committee on Naval Affairs5,980
- United States. Forest Service5,248
- United States. Department of the Army5,246
- Sotheby & Co. (London, England)4,781