Subject
- Auditoriums1
- Auroras1
- Australia1
- Austria--Vienna1
- Autographs1
- Automatic Finder Corporation1
- Avogadro's law1
- Avogadro, Amedeo, 1776-18561
- B.G. Teubner (Firm)1
- Bacteriologists1
- Baczewski, Alexander1
- Badisches Landesmuseum Karlsruhe1
- Baeck, Leo, 1873-19561
- Banting, F. G. (Frederick Grant), 1891-19411
- Barksy, George1
- Barsky, Georg1
- Bateson, Gregory, 1904-19801
- Baum, Vicki, 1888-19601
- Baumert, Moritz, 1818-18651
- Bayer AG1