Across
- 3. How many types of BD there are
- 4. A type of BD
- 6. Famous poet with BD
- 9. US president with BD
Down
- 1. Original term for BD
- 2. First name of the second person to conceptualize BD
- 5. Famous artist with BD
- 7. The highs of BD
- 8. Country where early understandings were