Carte de 1915 montrant les frontières de l'Ontario, telles que définies trois ans plus tôt, c'est-à-dire en 1912.
Map of the Province of Ontario, Dominion of Canada, Showing Northern and Western Portions of the Province Not Included in the Large Scale Map. [Inset on] Map of the Province of Ontario, Showing Districts, Counties, Townships, Post Offices, Railway Stations, Steam and Electric Railways, Canals and Roads, Ontario, Department of Lands and Forests, Bureau of Mines, 1915.
Archives de l'Ontario