Subject
- Railroads and state--Canada1
- Railroads and state--United States1
- Railroads--China1
- Railroads--China--Maps1
- Ratings and rankings1
- Reacreation areas1
- Refuse disposal industry1
- Regions1
- Regions (Administrative and political divisions)1
- Regulation1
- Religious institutions1
- Retail1
- Retail trade--Canada1
- Retail trade--United States1
- Rivers--Canada1
- Rivers--China1
- Roads--America1
- Ruins1
- Ruins, Modern1
- Safety1