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Dean, Wiliam Thorton. Preliminary Account of the trilobite Biostratigraphy of the Survey Peak and Outram Formations (Late Cambrian, Early Ordovician) at Wilcox Pass, southern Canadian rocky Mountains, Alberta. W.T. Dean. In Geological Survey of Canada commission géologiue du Canada , Geological Survey of Canada commission géologiue du Canada. S.1-10 : .1978, Pap.76-34.
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