Recherche dans la collection - Plan of coal mine leased and operated by Louis Martin, Duxbury, Alberta [Sec. 28, Tp. 40, Rge. 15, W. 4th M.]. Surveyed 18th July, 1914 by O. S. Finnie, Inspecting Engineer, M. L. & Y. Br. [Mining Lands & Yukon Branch], Dept. Interior, Ottawa. [cartographic material]