BOOKS 1930 - 1959

Railway Signal Engineering. Lewis, 1932.
    Reprinted by Kay, c1992.

Modern Railway Signalling on British Railways, by J Aitkin S B Aitkin c1935

Railway Block Telegraph Regulations, by J Aitkin SBA, 1945

Railways, Ships and Aeroplanes Illustrated. Odhams Press, 1946. (Includes a thirteen page chapter "In the signalbox".)

Railway Signalling and Communications - Installation and Maintenance St Margaret's Technical Press, c1948

Railway Signalling (Railway Signals: How they Work and What they Mean), by M Taylor Sampson Low, 1949

Footplate and Signal Cabin, by N Marlow Allen & Unwin 1956

Railway Signalling Systems, by John R Day & B K Cooper Frederick Muller 1958