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Creator
- Allen, John F.1
- Allen, Joseph Garrott, 1912-19921
- Allen, Ruth J.1
- Allfrey, Vincent George, 1921-3
- Allison, Anthony C. (Anthony Clifford), 1925-2
- Allison, Graham T.2
- Allison, Herbert Monroe, Jr., 1943-20131
- Allott, Gordon, 1907-19891
- Almond, Gabriel Abraham, 1911-20021
- Altenburg, Edgar, 1888-19673
- Altescu, Eugene I.2
- Altschul, Aaron Meyer, 1914-2
- Alvarez, Luis1
- Alway, Robert H.11
- Alway, Sophie1
- Amarel, Saul10
- Ameisen, Jean-Claude4
- American Academy of Arts and Sciences1
- American Association for the Advancement of Science5
- American Association of Nurserymen1