"A combined-volume reissue of the IRSE 'green booklets' no. 5. Principles of power point control and detection - no. 6. Signalling relays - no. 8. Typical selection circuits - no. 17. Track & lineside signalling circuits in AC electrified areas."
Title from cover.
Individual booklets originally published: 1949-1969.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
British Railway signalling practice. Signalling relays & circuits. ISBN 0902390201. Published by IRSE in 2005. Publication and catalogue information, links to buy online and reader comments.
