"This publication was researched and prepared by Bob Howes and Richard Allenand and is based on publication PC21 (published in 1987), updated from subsequent PSV Circle news sheets and publications"--page 2.
Publisher's no.: 2PC21.
A fleet history of Lancaster City Transport Ltd and its predecessors. ISBN 9781908953070. Published by The PSV Circle. Publication and catalogue information, links to buy online and reader comments.