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- United States47,221
- Geological Survey (U.S.)36,985
- United States. National Aeronautics and Space Administration24,930
- Yale University, degree granting institution19,856
- United States. Bureau of the Census12,450
- Walter L. Pforzheimer Intelligence Collection (Beinecke Rare Book and Manuscript Library)9,671
- Mozart, Wolfgang Amadeus, 1756-17918,382
- Langley Research Center7,770
- Bach, Johann Sebastian, 1685-17507,758
- Christie, Manson & Woods7,370
- U.S. Atomic Energy Commission6,814
- Beethoven, Ludwig van, 1770-18276,757
- Riewert Tode Collection of German Student Movements and Counter-Culture6,493
- Shakespeare, William, 1564-16166,275
- United States. War Department6,079
- United States. Congress. House. Committee on Naval Affairs5,980
- United States. Department of State5,358
- United States. Forest Service5,246
- United States. Department of the Army5,238
- Sotheby & Co. (London, England)4,780