- Radiator Coolant & Solvents, Grand Forks - Engine Coolant
- Radio Stations & Broadcasting Companies, Grand Forks
- Railroad Companies, Grand Forks
- Ready Mix Concrete, Grand Forks - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Grand Forks
- Real Estate, Grand Forks - Agent, Broker & Companies
- Real Estate Appraiser, Grand Forks - Appraisal Services
- Real Estate Appraisers & Consulting Services, Grand Forks
- Real Estate Consultants, Grand Forks
- Real Estate Services, Grand Forks
- Recycling Drop-Off Centers, Grand Forks
- Recycling Scrap & Waste Materials, Grand Forks - Scrap Metal, etc
- Refrigeration & Cooling Equipment, Parts & Supplies , Grand Forks - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refuse Collection & Disposal Services, Grand Forks
- Refuse Systems & Garbage Disposal, Grand Forks
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- Religious Organizations, Grand Forks
- Repair Services, Grand Forks
- Residential Construction Contractors, Grand Forks - General Contractors
- Resorts & Hotels, Grand Forks
- Restaurants/Food & Dining, Grand Forks
- Retaining Wall Contractors, Grand Forks - Build & Repair - Blocks, Concrete, Stones, etc
- Retirement Communities & Home, Assisted Living & Apartments, Grand Forks
- Road Construction, Grand Forks - Companies & Contractors
- Road Construction & Repair Contractors, Grand Forks
- Rodeo & Equestrian Equipment & Supplies, Grand Forks
- Roofing Materials & Supplies, Grand Forks
- RV & Campers Repair & Service, Grand Forks
- Rv Parks, Grand Forks
- RV Repair, Grand Forks - Recreational Vehicle
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