- American Public Transportation Association records, 1898/1999340
- American Rhododendron Society Papers
1931-19879
- American Rhododendron Society Papers
1949-19891
- American Rhododendron Society Printed
Material
ca.
1925-19862
- American Rhododendron Society Records, 1927/20225
- American Theatre Association records5
- Ami Hirata, Ceramicist, Papers, 1940/20191
- Ammen L. Burger, Jr. collection, 1917/19601
- Amos Koontz Papers I, 1809/1965, bulk 1936/19651
- Amos Koontz Papers II, 1865/197043
- Amélie Rives papers, 1930/19833
- Anatole and Vladimir Kalichevsky Papers, 1871/19552
- Ancella Bickley, Historian, Research Papers regarding African-Americans, 1775/2018, bulk 1970/2011114
- Anderson Family papers, 1755/19585
- Andrew C. L. Gatewood papers, 1860/19931