- Radio & Television Repair Shops , Postville - TV Repair
- Radio Stations & Broadcasting Companies, Postville
- Ready Mix Concrete, Postville - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Postville
- Real Estate, Postville - Agent, Broker & Companies
- Real Estate Services, Postville
- Rehabilitation Centers, Products & Services, Postville
- Rehabilitation Specialists, Postville
- Rehabilitational Job Training Services, Postville
- Religious Organizations, Postville
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- Repair Services, Postville
- Residential, Postville
- Residential Apartments, Postville
- Resource Centers, Postville
- Restaurants/Food & Dining, Postville
- Retail Book Stores, Postville
- Retirement Communities & Home, Assisted Living & Apartments, Postville
- Rigging Service & Crane Hoisting, Postville
- Roofing Contractors, Postville - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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