VANNS MICHAEL A - abc Signalling in the age of steam

Ian Allan. 1995, First Edition. (ISBN: 0711023506) Soft Cover, 12mo - over 6? - 7? tall. 112pp with b&w photos throughout. a history of rail signalling systems including early mechanical developments, electric telegraph,block system, 1870s revolution,regulations. Very Good/No Jacket.

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