Editorial comment on paper by R. S. Griffiths and T. S. Lascelles, read before Institution of Railway Signal Engineers; paper was so worded as to provoke discussion and arouse question whether what is known as speed signaling is preferable to existing principle which, to indicate contrast, is termed route signaling.
Speed signaling on railways
Engineer
Engineer ; 149 , n 3876
1930
1 Fig.
Aufsatz (Zeitschrift)
Englisch
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