Slogan Postal Markings of Canada 1920-30
Slogan Postal Markings of Canada in the Period from 1920-30, 1991 by Rosenblat, Daniel G.. Prepared by the Slogan Study group of BNAPS. Single- and multi-office listings of slogan postal markings in use from 1920-30. Includes earliest and latest recorded use. Cerlox bound, 78 pp.