"Union" Automatic Switching for Classification Yards
- Made:
- 1953-01 in United States
- publisher:
- Westinghouse Air Brake Co.
Westinghouse Air Brake Co. (Union Switch & Signal Division) operating manual ""Union" Automatic Switching for Classification Yards," January 1953. 33pp plus diagrams. Front cover has a drawing of rails with a photograph of a man working a signal board.
