REMOVE

1. Alco
2. Baldwin

WHAT

1. Steam (2)
2. Correspondence (1)
3. Freight (1)

WHO

1. MacGowan, J.K. (1)
2. Reets, E.R. (1)

WHEN

1. 1900s (2)
2. 1910s (1)
3. 1920s (1)
4. 1930s (1)
5. 1940s (1)