- "The 82nd Congress MUST Abolish the United Nations!" Korean War flyer, 1951/19521
- Abraham Anson papers, 1939/200524
- Adams T. Rice papers, 1922/19604
- Agnes Wolf papers, 1966/20061
- Alexander Haight family collection, 1764/19764
- Alexander Haight family collection, 1764/19777
- American Political Items Collectors collection9
- American Political Items Collectors collection, 1895/19881
- American Public Transportation Association records, 1898/1999340
- American Public Transportation Association records, 1950/19801
- American Theatre Association records5
- Arena Stage records, 1949/2010144
- Armistead L. Boothe collection, 1920/19836
- Arnold Goldman Living Newspaper collection, 1931/19738
- Arnold Sundgaard papers, 1925/1988190