Classification of the Cambrian system of North America

Charles Doolittle Walcott

doi:10.2475/ajs.s3-32.188.138

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Walcott, C. D. (1886). Classification of the Cambrian system of North America. American Journal of Science, s3-32(188), 138–157. https://doi.org/10.2475/ajs.s3-32.188.138

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Classification of the Cambrian System of North America