Spatial Coverage
- Bighorn National Forest (Wyo.)1
- Black Canyon of the Gunnison National Park (Colo.)1
- Black Hills National Forest (S.D. and Wyo.)1
- Black Sea Region1
- Bogotá (Colombie)1
- Bosnia and Hercegovina1
- Boulder County1
- Brazil1
- British Columbia1
- Brooks Range1
- Brooks Range.1
- Burma1
- Cambodia1
- Cambodia.1
- Canada1
- Caspian Sea Region1
- Catron County1
- Champaign County1
- Chemical Industries1
- Chesapeake and Ohio Canal National Historical Park1
