Spatial Coverage
- Amazon River1
- Amazon River Region1
- Amazon River Region.1
- Amazon River Valley1
- Amazon River Valley.1
- Amazon River.1
- Ankara (Turkey)1
- Atlantic Coast (U.S.)1
- Austria1
- Baltic Sea Region1
- Black Sea Region1
- Bolivia1
- Canada, Eastern1
- Cape Henry (Virginia Beach, Va.)1
- Caucasus1
- Cedar Key (Fla.)1
- Cedar Key.1
- Chesapeake Bay (Md. and Va.)1
- Colorado1
- Columbia River1
