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"A combined-volume reissue of the IRSE 'green booklets' no. 24. Automatic warning systems of train control and trainstops - no. 25. Level crossing protection - no. 26. Remote control of railway signal interlocking equipment."
Title from cover.
Individual booklets originally published: 1949-1969.
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British Railway signalling practice. AWS, level crossings & remote control systems. ISBN 0902390228. Published by IRSE in 2005. Publication and catalogue information, links to buy online and reader comments.