United Telephone/Turtle Mountain Online Phone Book - Langdon, ND (2017) : Yellow Pages - Page 31 : Land Companies, Laundries-Self Service, Lawn Mowers, Leather Goods-Retail, Legal Research & Support Services, Libraries-Public, Limousine Service, Liquor Stores, Liquors-Off Sale-Retail, Liquors-On Sale-Retail, Loans, Lumber-Retail, Machine Shops, Machinery Rebuild & Repair, Manufacturing, Mason Contractors