'...incorporates the first supplement to last year's "Local Publicity Slogan Postmarks" and the fifth supplement to the Second (1965) edition of "Slogan Postmarks of the United Kingdom".' - Introduction.
Slogan postmarks of the United Kingdom. 1970. ISBN 095005464X. Published by C.R.H. Parsons, C.G. Peachey and G.R. Pearson in 1971. Publication and catalogue information, links to buy online and reader comments.