Slogan postmarks of the United Kingdom : an illustrated reference catalogue /
Parsons, Cyril Russell Hamilton.
Pearson, George R.joint author
Aylesbury : [The authors],
1965.
Kept up to date with supplements.
Previous ed. published as: Slogan postmarks of Great Britain. 1962. Following ed. published as: Slogan postmarks of the United Kingdom, 1917-69. 1974.
Postal slogan cancellations