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- United States2,354
- United States. National Aeronautics and Space Administration638
- United States. Congress. Senate. Committee on the Judiciary. (1816- )409
- Geological Survey (U.S.)404
- Yale University326
- United States. Congress. House316
- Yale University, degree granting institution308
- United States. Congress. House. Committee on the Judiciary. (1813- )295
- United States. General Accounting Office195
- Riewert Tode Collection of German Student Movements and Counter-Culture191
- Eastland, James O. (James Oliver), 1904-1986162
- McClellan, John Little, 1896-1977159
- Langley Research Center157
- Lewis Research Center157
- SpringerLink (Online service)155
- Walter L. Pforzheimer Intelligence Collection (Beinecke Rare Book and Manuscript Library)155
- AM (Publisher), digitiser149
- Mozart, Wolfgang Amadeus, 1756-1791145
- Bach, Johann Sebastian, 1685-1750138
- Geological Survey (U.S.), issuing body137