- American Institute of Architects1
- American Institute of Architects. Women in Architecture1
- American Public Transportation Association1
- American Rhododendron Society1
- American Studies Program2
- American University (Washington, D.C.)1
- American Work Horse Museum (Lexington, VA)1
- Amory, Thomas D. (Thomas Dwyer), 1893-19181
- Anbian, Robert1
- Anderson Gallery1
- Anderson, Allen (Allen L.)1
- Anderson, Clinton Lee1
- Anderson, Eleanor Copenhaver, 1896-19851
- Anderson, Maggie1
- Anderson, Robert Lane, 1907-19511