Spatial Coverage
- Atlantic States6
- New York Harbor (N.Y. and N.J.)6
- Northwest, Pacific6
- Rappahannock River (Va.)6
- Southern States6
- Texas6
- Texas, South6
- Washington (State)6
- Atlantic Coast (Mass.)5
- Atlantic Coast (South Atlantic States)5
- Atlantic Coast.5
- Maryland5
- Missouri River5
- Pacific Coast (Calif.)5
- Rappahannock River.5
- Tennessee5
- Connecticut4
- Long Island4
- Long Island Sound (N.Y. and Conn.)4
- Mississippi4
