- Modern-Earthline Companies (Somerset, Pa.)1
- Moebs, Noel N.1
- Mom International Association (Huntington, W. Va.)1
- Mon County Habitat for Humanity (Morgantown, W. Va.)2
- Mon Valley Green Space Coalition (Morgantown, W. Va.)1
- Mon Valley Sleep Center (Morgantown, W. Va.)1
- Monaghan, Jay, 1891-1980.1
- Monongah (W. Va.). Laws, statutes, etc.1
- Monongahela National Forest.1
- Monongahela Navigation Company.1
- Monongahela Power Company.8
- Monongahela Power Company. Area Development Department. 2
- Monongahela Power Company. Home Economics Department.4
- Monongahela Power System. Home Economics Department.1
- Monongahela Power and Railway Company (Fairmont, W. Va.)2
- Monongahela Railway Company.1
- Monongahela River Trails Conservancy (Morgantown, W. Va.)1
- Monongahela Soil Conservation District (Morgantown, W. Va.)2
- Monongahela Valley Agricultural and Mechanical Society.1
- Monongahela Valley Coal Mining Institute.3
