Railroads. 3 items, all from General Railway Signal Company. (1) Elemental Principles, GRS Type F cTc System. (2) GRS Car Retarder System Maintenance Instructions, Handbook 35. (3) Centralized Traffic Control, Type K, Class M Coded System.

General Railway Signal Company.

Published by General Railway Signal Company., 1936
Condition: Used - Very good Soft cover

Sold by JF Ptak Science Books, Hendersonville, NC, U.S.A.

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Used - Soft cover

Condition: Used - Very good

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