- "The 82nd Congress MUST Abolish the United Nations!" Korean War flyer, 1951/19521
- Abraham Anson papers, 1939/200515
- Adams T. Rice papers, 1922/19604
- Alexander Haight family collection, 1764/19764
- American Political Items Collectors collection6
- American Public Transportation Association records, 1898/1999336
- American Public Transportation Association records, 1950/19801
- American Theatre Association records6
- Arena Stage records, 1949/2010102
- Armistead L. Boothe collection, 1920/19832
- Arnold Goldman Living Newspaper collection, 1931/19734
- Arnold Sundgaard papers, 1925/1988190
- Arthur E. Scott photograph collection41
- Arthur E. Scott photograph collection, 1910/197642
- Arthur Herman papers, 1950/19991