- Radio & Television Repair Shops , Northfield - TV Repair
- Radio Manufacturers, Northfield
- Radioactivity Detection Devices, Northfield
- Ready Mix Concrete, Northfield - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Northfield
- Real Estate, Northfield - Agent, Broker & Companies
- Real Estate Appraiser, Northfield - Appraisal Services
- Real Estate Appraisers & Consulting Services, Northfield
- Real Estate Consultants, Northfield
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- Real Estate Services, Northfield
- Religious Organizations, Northfield
- Repair Services, Northfield
- Resident Camps, Northfield
- Residential Landfills, Northfield
- Resorts & Hotels, Northfield
- Restaurants/Food & Dining, Northfield
- Roofing Consultants, Northfield - Roofing Companies
- Roofing Contractors, Northfield - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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