A statistical and descriptive handbook of the Dominion. Prepared under the authority of the Government of the Dominion and the various provincial administrations. Edited and published by E.B. Biggar
1971 census of Canada. Economic characteristics, labour force, occupations = Recensement du Canada 1971. Volume 3, partie 3, Caractéristiques économiques, population active, professions ; Bulletin 3.3-4