Collection
- American Relief Administration Records, 1921-19392
- Amiri Baraka papers, 1945-2015, bulk 1970s-2000s16
- Amnesty International of the USA Inc : National Office records, 1966-2003, bulk 1974-199338
- Amos Vogel papers, 1896-2001, bulk 1960-199018
- Andrew Alpern Collection of Edward Gorey Materials, 1954-20196
- Andrew Sarris papers, 1945-1988, bulk 1965-19857
- Andrew W. Cordier papers, 1918-19759
- AndreĢ Schiffrin papers, 1944-20145
- Angus and Hetty MacLise papers, 1950s-201017
- Annie Laurie Williams records, 1922-19718
- Anton Ivanovich and Kseniia Vasil'evna Denikin Papers, 1905-19706
- Archons of Colophon records, 1915-20023
- Ariadna Vladimirovna Tyrkova-Williams Papers, 1897-19615
- Armstrong Memorial Research Foundation records, 1944-20035
- Arthur B. Krim papers, 1922-1995, bulk 1965-199225
- Arthur Levitt papers, 1948-200728
- Arthur Mitchell Collection, 1800s-2021, bulk 1934-201927
- Arthur Whittier Macmahon papers, 1911-19772
- Asta Aristova Papers, 1916-20042
- Austin Strong papers, 1890-19618