Sedgwick and Murchison; Cambrian and Silurian | Published in American Journal of Science

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American Journal of Science

Dana, J. D. (1890). Sedgwick and Murchison; Cambrian and Silurian. American Journal of Science, s3-39(231), 167–180. https://doi.org/10.2475/ajs.s3-39.231.167

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