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Cambrian Geology and Paleontology II: No 7--Cambro-ordovician boundary in British Columbia with description of fossils
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Cambrian Geology and Paleontology II: No 7--Cambro-ordovician boundary in British Columbia with description of fossils
Date:
1912
Citation:
Walcott, Charles D. 1912. Cambrian Geology and Paleontology II: No 7--Cambro-ordovician boundary in British Columbia with description of fossils. Washington, DC: Smithsonian Institution.
