- Radiator Coolant & Solvents, Thetford Mines - Engine Coolant
- Radio & Television Repair Shops , Thetford Mines - TV Repair
- Radio Stations & Broadcasting Companies, Thetford Mines
- Reading Instruction Schools, Thetford Mines
- Ready Mix Concrete, Thetford Mines - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Thetford Mines
- Real Estate, Thetford Mines - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Thetford Mines
- Real Estate Agent - Property Lessors, Thetford Mines
- Real Estate Appraiser, Thetford Mines - Appraisal Services
- Real Estate Appraisers & Consulting Services, Thetford Mines
- Real Estate Broker, Thetford Mines
- Real Estate Services, Thetford Mines
- Records, Tapes, CDs - Used & Vintage, Thetford Mines
- Recreational Services, Thetford Mines
- Recycling Scrap & Waste Materials, Thetford Mines - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Thetford Mines
- Refrigeration & Cooling Equipment, Parts & Supplies , Thetford Mines - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Thetford Mines - Ac, Freezer, Refrigerator Repair
- Refrigerator Sales, Service & Repair, Thetford Mines - Fridge
- Refuse Collection & Disposal Services, Thetford Mines
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- Refuse Systems & Garbage Disposal, Thetford Mines
- Registered Retirement Savings Plan, Thetford Mines
- Rehabilitation Services, Thetford Mines
- Rehabilitational Job Training Services, Thetford Mines
- Religious Organizations, Thetford Mines
- Repair Services, Thetford Mines
- Research Services, Thetford Mines
- Residential, Thetford Mines
- Residential Apartments, Thetford Mines
- Residential Landfills, Thetford Mines
- Restaurants/Food & Dining, Thetford Mines
- Resume Service, Thetford Mines
- Retirement Communities & Home, Assisted Living & Apartments, Thetford Mines
- Retirement Homes, Thetford Mines
- Road Construction, Thetford Mines - Companies & Contractors
- Road Construction & Repair Contractors, Thetford Mines
- Rods, Springs & Suspension Equipment & Supplies, Thetford Mines
- Roofing Consultants, Thetford Mines - Roofing Companies
- Roofing Contractors, Thetford Mines - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Thetford Mines
- Rust Preventives, Thetford Mines
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