Recherche dans la collection - Plan of coal mine operated by Joseph Oborn, Milk River, Alta., W. 1/2, Sec. 31, Tp. 2, Rg. 15, W. 4th. Meridian, Sale no. 694M. Surveyed August 6th, 1915. O. S. Finnie, D. L. S., Inspecting Engineer, M. L. & Y. [Mining Lands & Yukon] Branch, Dept. of Interior, Ottawa. Survey extended 24th July, 1916. [cartographic material]