'Proceedings of the Datafair '75 Conference held in London, 1-3 October 1975, organised by the British Computer Society in association with International Business Communications Limited' - title page verso.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Progress in information systems : the Datafair papers. ISBN 0903012324. Published by Advance Publications Ltd in 1976. Publication and catalogue information, links to buy online and reader comments.
