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Dilworth, Harold M.
Canadian 'blackout' postmarks of west coast ports
v. 26, no. 5, 1969, p. 127-133
Reprinted as "Canadian blackout machine slogan postmarks of WWII" in Canadian Military Mail Study Group. Newsletter, no. 87, 1989, p. 623-627.
Morin, Cimon. Canadian philately: bibliography and index. Volumes 1-3. 1979-1998. Reference 2787