- American Political Items Collectors collection, 1895/19881
- American Public Transportation Association records, 1898/1999111
- American Rhododendron Society Papers
1931-198717
- American Rhododendron Society Papers
1949-19899
- American Rhododendron Society Papers
1963-19883
- American Rhododendron Society Papers
ca.
1968-198927
- American Rhododendron Society Printed
Material
ca.
1925-19862
- American Rhododendron Society Records, 1927/20224
- American Society of Pediatric Nephrology records, 1955/202210
- American Studies Program Records, 1960/20062
- American Theatre Association records470
- American Theatre Association records, 1972/19861
- American Work Horse Museum Collection, 1971/19996
- Ami Hirata, Ceramicist, Papers, 1940/20191
- Amos Koontz Papers II, 1865/19703