- Laboratories Dental, Somerville
- Laboratories Medical, Somerville
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Somerville
- Lawn & Garden Equipment & Supplies, Somerville
- Lawn & Garden Services, Somerville
- Lawn Maintenance Services, Somerville
- Lawn Mower Repair & Blade Sharpening Service, Somerville
- Lawyers & Attorneys, Somerville
- Legal Professionals, Somerville
- Liquor Stores, Somerville
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