Cornell University Library Digital Collections
Subject
- Pennsylvania Railroad63
- Pit Mine1
- Pittsburgh & Lake Erie1
- Poplar Avenue1
- Pullman Cars1
- Purina1
- R. E. Ellis Draying1
- Railroad cars371
- Railroad crossings[remove]583
- Railroad passenger cars47
- Railroad stations45
- Railroad switches114
- Railroad terminals13
- Railroad tracks560
- Railroad yards106
- Railroads--Buildings and structures230
- Railroads--Employees111
- Railroads--Equipment and supplies34
- Railroads--Freight297
- Railroads--Maintenance and repair46