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- Abate, Dillon A. 7
- Abbey, Bill 1
- Abdul-Bassit, Jalil A. 9
- Abernathy, Ralph, 1926-1990 1
- Abrahamson, Richard 1
- Abram, Ted 1
- Academic freedom 4
- Accipitridae 19
- Acipenseriformes 6
- Acker, Joan 4
- Acker, Phil 1
- Ackerman, Robert L. 1
- Ackley, Marshall A. 9
- Ackman, Matthew S. 1
- Acosta, Andrew J. 13
- Acosta, Cameron J. 1
- Acrobatics 143
- Actinopterygii, Aulopiformes 2
- Actions and defenses 1
- Activists 1