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The influence of SO3 and C3A on the early reaction rates of Portland cement in the presence of calcium lignosulfonate
Récits de voyages : sur les Grands Lacs, à travers les Laurentides, promenades dans le vieux Québec
Mrs. Beatrice Daymon, wife of Art Daymon, Waterton Lakes National Park, Alberta.
Grades 8-11, Waterton School, Waterton, Alberta.