CORTE, Arturo E. Relationship between four ground patterns, structure of the active layer and type and distribution of ice in permafrost Thule, Groenland. U.S. Army Cold Regions Research and Engineering Laboratory, Corps of Engineers, Research Report, 88, Hanover, Feb. 1962, 79 pages, ill., app. - Hamelin, Louis-Edmond (Cahiers de géographie du Québec, 1962)