- Machine Shop & Tool Repair Service, Lyndonville
- Machine Shop Rotary Surface Grinding, Lyndonville - Tool Grinding & Sharpening
- Machinery, Supplies & Equipment - Construction & Contractor Related, Lyndonville
- Manufactured & Mobile Home Movers & Transporting, Lyndonville
- Manufacturing, Lyndonville
- Marriage & Family Counselors, Lyndonville
- Masonry Contractors, Lyndonville - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Lyndonville
- Meat Market, Wholesale & Products, Lyndonville
- Medical Groups & Clinics, Lyndonville - Medical & Health Centers
- Medical Supplies & Equipment, Lyndonville
- Mental Health Specialists, Lyndonville - Psychologist, Psychiatrist, Psychotherapist, etc
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- Methodist Church, Lyndonville
- Micrometers, Lyndonville
- Millwork Contractors, Lyndonville
- Miscellaneous Government, Lyndonville
- Miscellaneous Manufacturing, Lyndonville
- Miscellaneous Professional, Lyndonville
- Modular & Mobile Homes For Sale, Lyndonville - Manufactured Homes Sale & Service
- Motor Vehicle, Lyndonville
- Motor Vehicle Rental & Leasing, Lyndonville
- Moving Truck Rental , Lyndonville
- Muffler Shop & Exhaust Systems, Lyndonville
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