Signalling
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WARBURTON, L.G. & ANDERSON, V.R.
A Pictorial Record of LMS Signals - Standard Semaphore Signals and Signal Boxes of the L.M.S.
Study with numerous diagrams and photographs published in 1972 in small print run. The pages are on a quality paper but the dust wrapper was a non-gloss paper which is typically found with edge wear and fading.
WESLEY, A. C.
Route Control Systems AEI-GRS
The Institution of Railway Signal Engineers Booklet No. 21
WILSON, H. Raynar
Railway Signalling: Automatic
An introductory treatment of the purposes equipment and methods of automatic signalling and track-circuits for steam and electric railways
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