Recherche dans la collection - Triangulation in the Rocky and Selkirk Mountains to accompany the Report of P.A. Carson, D.L.S. 1907...Topographical Survey of Canada Trigonometrical Section. Photo-lithographed at the Surveyor General's Office Ottawa, Canada [Dept. of the Interior] Annual Report of the Topographical Surveys Branch 1907-1908. [cartographic material]

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