London Midland & Scottish Railway : regulations for train signalling on double lines of railway by the absolute block system ; by the permissive block system ; also general instructions to signalmen, with supplementary regulations for signalling where intermediate block signals are provided : 1947.
London, Midland and Scottish Railway Company.
Pulborough, West Sussex : Dragonwheel Books,
2005.
Facsimile reprint of original published: 1947.
London, Midland and Scottish Railway Company
London, Midland and Scottish Railway Company.
Railroads
Railroads