Spatial Coverage
- Revere1
- Revere (Mass.)1
- Rhineland.1
- Rhode Island1
- Rio Grande County (Colo.)1
- Rogers County (Okla.)1
- Romania1
- Russia, Southern1
- Saguache County (Colo.)1
- Saint Lawrence River Valley1
- Silver City1
- South Carolina1
- Sulphur Springs Valley (Ariz.)1
- Tanana Region (Alaska)1
- Teller County1
- Tenino (Wash.)1
- Tennesse1
- Thermopolis (Wyo.)1
- Thurston County (Wash.)1
- Tulsa County (Okla.)1
