- Animal Experimentation25
- Animal Experimentation -- ethics12
- Animal Experimentation -- history1
- Animal Experimentation -- legislation & jurisprudence1
- Animal Husbandry1
- Animal Husbandry -- instrumentation1
- Animal Husbandry -- methods1
- Animal Structures1
- Animals9
- Animals, Domestic1
- Animals, Laboratory42
- Animals, Wild1
- Ankle Injuries -- prevention & control2
- Annandale, Thomas, 1839-1908.1
- Anne, Princess Royal, daughter of Elizabeth II, Queen of Great Britain, 1950-1
- Annis, Edward R., 1913-2009.1
- Anniversaries and Special Events487
- Anopheles1
- Anopheles -- embryology1
- Anopheles -- pathogenicity5