All railroad intercommunications handled on private system which, at minimum operating expense, has capacity for normal operations as well as peaks. (see also Ry Age v 111 n 22 Nov 29 1941 p 908-9 and 912)
Illinois Central uses automatic telephone system on Chicago terminal area
Ry Signaling
Railway Signaling ; 34 , n 9
1941
3 pages
Article (Journal)
English
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Illinois Central uses automatic telephone system on Chicago terminal area
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