United Telephone/Turtle Mountain Online Phone Book - Langdon, ND (2017) : Yellow Pages - Page 35 : Radio Communication Equipment & Systems, Radio Stations & Broadcasting Companies, Real Estate, Recreation Centers, Recycling Services, Rehabilitation Services, Restaurants, Restaurants-Bar & Grill, Restaurants-Sandwiches, Retirement & Life Care Communities & Homes, Retirement Planning Service, Roofing Contractors