Range of signals situated in tunnels; color values of lights; etc. Indexed in Engineering Index 1938 p 999, from Revue Generale des Chemins de Fer Dec 1937.


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    Title :

    Use of luminescent tubes to supplement signals in tunnels


    Additional title:

    Int Ry Congress Assn -- Bul


    Contributors:
    Levi, R. (author)


    Publication date :

    1938


    Size :

    5 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English