Collection
- Arthur B. Krim papers, 1922-1995, bulk 1965-19921
- Arthur Mitchell Collection, 1800s-2021, bulk 1934-20193
- Arthur and Rhoda Symons Correspondence and Manuscripts, 1884-19731
- Association of Book Travelers records, 1925-19841
- Barnard Family Papers, 1807-1969, bulk 1850-19115
- Barrell family papers, 1751-1929, bulk 1791-18892
- Bella Abzug papers, 1937-1996, bulk 1970-19861
- Benjamin Sonnenberg papers, 1956-20101
- Béla Bartók manuscripts, 1940-19431
- Bob Fass Recordings and Papers, 1935-2011, bulk 1963-19913
- Boehm Foundation records, 1963-2004, bulk 1993-20021
- Bohdan Rubchak papers, 1928-20201
- Book Arts Ephemera collection, 1890-201911
- Brander Matthews Dramatic Museum Ephemera, 1750-19701
- Brenda Miller Cooper "Giants in the Earth" Collection, 19511
- Bureau of Applied Social Research records, 1938-19772
- C. J.Bulliet papers, 1899-19522
- Carlisle, George William Frederick Howard, Earl of, Letters, 1841-18421
- Carnegie Corporation of New York, Series III: Grant Records, 1911-19942
- Carnegie Endowment for International Peace European Center records, 1910-19541