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Incoming Resources
- American locomotives, a pictorial record of steam power, 1900-1950, by Edwin P. Alexander
- The Pennsylvania Railroad, a pictorial history, by Edwin P. Alexander
- Civil War railroads & models, by Edwin P. Alexander
- Iron horses, American locomotives 1829-1900, E.P. Alexander
- Down at the depot, American railroad stations from 1831 to 1920, Edwin P. Alexander
- On the main line, the Pennsylvania Railroad in the 19th century, [by] Edwin P. Alexander
- The Pennsylvania Railroad ;, a pictorial history