Coutts, Cecil (2012). Slogan Postmarks of Canada.

Beginning in 1987, research by the Slogan Study Group of the British North America Philatelic Society Ltd. was based on official post office documentation and proof impressions that certainly gave the work credibility. The efforts of this Group culminated in the release in 1996 of the first edition of Slogan Postmarks of Canada, a compilation of all slogan cancellation including those relating to air mail. This was followed by Supplement Number One in 1999 and the Second Edition in 2002. The Third Edition, published in 2007, went out of print without fully satisfying demand, leading to this BNAPS reprint which includes among the listings 165 post-2007 updates of specific slogan cancellations. Previous purchasers of the 2007 Third Edition of the full Slogan catalogue can obtain a PDF file containing the post-2007 updates by email from the author at . Cec Coutts, a retired Superintendent of the Royal Canadian Mounted Police, has been a member of BNAPS since 1978. In addition to his slogan cancel work he is Secretary/Treasurer of the Pacific Northwest Regional Group of BNAPS.