- "Official New York Subway Map and Guide", 19611
- "We Were Not Shadows" by Colonel E.P.J. Ryan, O.B.E typed manuscript, 1955/19651
- Abraham Anson papers, 1939/200544
- Alexander Haight family collection, 1764/19764
- Alexander Haight family collection, 1764/19778
- American Political Items Collectors collection10
- American Political Items Collectors collection, 1895/19881
- American Public Transportation Association records, 1898/1999360
- American Public Transportation Association records, 1950/19801
- American Theatre Association records9
- Arena Stage records, 1949/2010404
- Armistead L. Boothe collection, 1920/198312
- Arnold Goldman Living Newspaper collection, 1931/19738
- Arnold Sundgaard papers, 1925/1988216
- Arthur E. Scott photograph collection67