- "California or Bust" travel scrapbook, 19561
- "We Were Not Shadows" by Colonel E.P.J. Ryan, O.B.E typed manuscript, 1955/19651
- Abraham Anson papers, 1939/200550
- Adams T. Rice papers, 1922/19604
- Alexander Haight family collection, 1764/19764
- Alexander Haight family collection, 1764/19777
- American Political Items Collectors collection8
- American Political Items Collectors collection, 1895/19881
- American Public Transportation Association records, 1898/1999344
- American Public Transportation Association records, 1950/19801
- American Theatre Association records5
- Arena Stage records, 1949/2010156
- Armistead L. Boothe collection, 1920/198312
- Arnold Goldman Living Newspaper collection, 1931/19738
- Arnold Sundgaard papers, 1925/1988190