Spatial Coverage
- Boston Region (Mass.)1
- British Columbia1
- California, Northern1
- Cape Fear River (N.C.)1
- Cape Fear River.1
- Central Europe.1
- Chesapeake Bay (Md. and Va.)1
- Chincoteague Bay (Md. and Va.)1
- Clayton County1
- Clayton County (Iowa)1
- Colombia1
- Colombia.1
- Connecticut1
- Crawford County1
- Crawford County.1
- Crimea (Ukraine)1
- Cumberland (England)1
- Delaware Bay Region (Del. and N.J.)1
- Egypt1
- Europe, Central.1
