Subjects
- Mines and mineral resources1
- Mines and mineral resources -- West Virginia1
- Ohio Valley - rivers.1
- Oil and Gas Industry and Fields.1
- Portland cement1
- Property Owners, Cheat Area.1
- Railroad workers.1
- Railroads2
- Railroads - Cumberland and Pennsylvania Railroad Company.1
- Railroads - Pittsburgh and Connellsville Railroad.1
- Railroads - Western Maryland Railroad Company.1
- Rivers and river valleys.1
- Road Construction.1
- Roads. SEE ALSO Turnpikes.1
- Science -- History1