The XY Company, 1798 to 1814 - Pendergast, R. A. (Université d'Ottawa, 1957)
Keywords: Compagnie XY; Fourrure

The Northwest Company - Campbell, Marjorie Wilkins (Macmillan, 1957)
Keywords: Compagnie du Nord-Ouest; Fourrure

Early Canadian Historical Literature: The Journal of the Traders of the North West Co. Of Merchants from Canada - O'Brien, M. V. (Université McGill, 1957)
Keywords: Compagnie du Nord-Ouest; Fourrure; Marchands