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- 30.00 exact sciences: general1
- AIDS (Disease)13
- AIDS (Disease) in children1
- AIDS (Disease) in infants1
- AIDS (Disease) in women1
- AIDS Action Pledge (Organization)1
- AIDS activists1
- AIDS malignancies1
- AIDS-Related Opportunistic Infections1
- ARS Bioenergy Program (U.S.)1
- Ability testing2
- Abnormalities2
- Abnormalities, Human3
- Abstracts18
- Abused children2
- Academia de Ciencias de la República Dominicana1
- Academic achievement1
- Academic libraries2
- Academies and Institutes4
- Accademia di scienze, lettere e arti di Palermo1