- Laboratories Medical, Brownfield
- Laundries Full Service Commercial, Brownfield
- Laundry Self Service, Brownfield
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Brownfield
- Lawn & Garden Equipment & Supplies, Brownfield
- Lawn & Garden Services, Brownfield
- Lawn Maintenance Services, Brownfield
- Lawn Mowers & Power Equipment, Brownfield
- Lawyers & Attorneys, Brownfield
- Leather Goods Cleaners & Dyers, Brownfield
- Legal Professionals, Brownfield
- Libraries, Brownfield
- Life Insurance, Brownfield
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- Liquid Handling Equipment & Systems, Brownfield
- Livestock, Brownfield
- Livestock Feeding Service, Brownfield
- Loans Farm & Ranch, Brownfield
- Loans Personal, Brownfield
- Locks, Brownfield
- Locksmiths, Brownfield - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Brownfield
- Lodging, Brownfield
- Lodging Services, Brownfield
- Long Haul Trucking Companies, Brownfield
- Lumber & Lumber Products, Brownfield
- Lumber & Lumber Products, Brownfield
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