Spatial Coverage
- Clear Creek County.1
- Cochise County1
- Coconino County (Ariz.)1
- Coconino County.1
- Coeur d'Alene Mining District (Idaho)1
- Coeur d'Alene Mining District.1
- Conconully (Wash.)1
- Connecticut.1
- Cortland County (N.Y.)1
- Cuba1
- Dorchester County1
- Dorchester County (Md.)1
- Douglas County (Nev.)1
- East Baton Rouge Parish (La.)1
- East Feliciana Parish (La.)1
- Esmeralda County1
- Esmeralda County (Nev.)1
- Esmeralda County.1
- Europe1
- Fayette County (Iowa)1
