Collection
- American Booksellers Association records, 1910s-2010s1
- Americans United for Separation of Church and State Subject Files, 1953-20181
- Amnesty International of the USA Inc. Hilary Naylor Papers, 1977-2006, bulk 1985-19971
- Amnesty International of the USA Inc. Rick Halperin Papers, 1987-1999, bulk 1989-19951
- Amram Scheinfeld papers, 1915-19751
- Anastasii Prokop'evich Vorobchuk Papers, 1915-19631
- Anatolii L'vovich Markov, 1933-19631
- Anatolii Petrovich Beklemishev Papers, 1917-19591
- Anatolii Petrovich Vel'min Papers, 1940-19631
- Andrei Fedorovich Ponomarev Papers, 1923-19631
- Andrei Kazimirovich Savitskii Papers, 1910-19681
- Andrei Vasil'evich Kravtsov Letters, 1924-19321
- Andrew Cordier Papers at the Columbia University Archives, 1923-19741
- Andrew Sarris papers, 1945-1988, bulk 1965-19851
- Andrew W. Cordier papers, 1918-19751
- AndreĢ Schiffrin papers, 1944-20141
- Andryi Konstantynovych Moskalenko Papers, 1943-19541
- Anna Robertson Brown Lindsay papers, 1898-19441
- Annette Riley Fry Collection on Letchworth Village, 1907-19761
- Ariadna Vladimirovna Tyrkova-Williams Papers, 1897-19611