132 delegates at conference held in France.
Institution of Railway Signal Engs. Signal Control Circuits, 1968
1960 London Central Hours of Opening of Railway Signal Boxes Southern Region
1948 London Midland Western Division Hours of Opening of Railway Signal Boxes
1977 Fasc Scottish Region Hours of Opening of Railway Signal Boxes Timetable
1973 Fasc Scottish Region Hours of Opening of Railway Signal Boxes Timetable
1955 Fasc Perth Dundee Scottish Region Hours of Opening of Railway Signal Boxes
