G-R-S carrier control; description, operation and maintenance.
Title:
G-R-S carrier control; description, operation and maintenance.
Author:
General Railway Signal Company.
Corporate Author:
Publication Information:
Rochester, N.Y., [publisher not identified], 1949.
Physical Description:
71 pages : illustrations, diagrams (part folded) ; 23 cm.
Language:
English
Format :
Book