| American Psychological Association. Matches 17 items |
| American Psychological Association. Ad Hoc Committee on Ethical Standards in Psychological Research. Matches 1 item |
| American Psychological Association. Science Directorate. Matches 1 item |
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American Psychological Association. Society for Personality and Social Psychology. SEE: Society for Personality and Social Psychology Matches 2 items
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| American Radio Relay League. Matches 7 items |
| American Repertory Theatre (Cambridge, Mass.) Matches 1 item |
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American Repertory Theatre Company (Cambridge, Mass.) SEE: American Repertory Theatre (Cambridge, Mass.) Matches 1 item
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American Revolution, Library of Congress Symposia on the 1st, (1972) SEE: Library of Congress Symposia on the American Revolution 1st, (1972) Matches 1 item
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| American-Scandinavian Foundation. Matches 1 item |
| American Scenic and Historic Preservation Society. Matches 1 item |