Encyclopedias, Almanacs, Transcripts, and Maps
- block printing
- Bloembergen, Nicolaas
- Blois
- Blondel, François
- Blood Blackfoot
- blood substitute
- bloodworm
- Bloomgarden, Solomon
- Bloomsburg
- Blount, James Henderson
- Blount, Winton Malcolm, Jr.
- Blow, Susan Elizabeth
- Bloy, Léon
- Blücher, Vasily Konstantinovich
- Blue Cross plans
- Blue Island
- Blue Rider
- blue vitriol
- blue-eyed grass
- bluebonnet