"Incorporating updates and revisions to:- Part 1. Trams & trolleybuses ; Part 3. Country area buses & Green Line coaches ; Part 4. Adult & scholar prepaids ; Part 5. Miscellaneous issues."
London transport numerical-stage (deaf & dumb) punch tickets. Part 2, Central area buses by R. J. Williamson. ISBN 9780903209632. Published by Transport Ticket Society in 2008. Publication and catalogue information, links to buy online and reader comments.