- Radio Stations & Broadcasting Companies, Joshua Tree
- Radiologists, Joshua Tree - Radiology Doctors, Physicians & Surgeons
- Reading Instruction Schools, Joshua Tree
- Ready Mix Concrete, Joshua Tree - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Joshua Tree
- Real Estate, Joshua Tree - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Joshua Tree
- Real Estate Agent - Property Lessors, Joshua Tree
- Real Estate Broker, Joshua Tree
- Real Estate Services, Joshua Tree
- Religious Education, Joshua Tree
- Religious Organizations, Joshua Tree
- Repair Services, Joshua Tree
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- Research Services, Joshua Tree
- Residential, Joshua Tree
- Residential Apartments, Joshua Tree
- Residential Care Facilities, Joshua Tree
- Residential Construction Contractors, Joshua Tree - General Contractors
- Restaurants/Food & Dining, Joshua Tree
- Retail Book Stores, Joshua Tree
- Rigging Service & Crane Hoisting, Joshua Tree
- Rock Shops, Joshua Tree
- Roofing Consultants, Joshua Tree - Roofing Companies
- Roofing Contractors, Joshua Tree - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rv Parks, Joshua Tree
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