Two-way communication carried on between moving and stationary telephone station; description of system. See Engineering Index 1929, p. 1554. (see also Ry. Age, no. 15, May 3, 1930, pp. 1053-1054)
Telephoning from and to moving train on Canadian National Railways
Can. Ry. Mar. World
1930
4 pages
2 Figs.
Article (Journal)
English
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