Williston, Samuel Wendell, 1897, The Kansas Niobrara Cretaceous

Williston, Samuel Wendell, 1897, The Kansas Niobrara Cretaceous, Kansas University Geological Survey 2, pp. 235-246

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urn:lsid:zoobank.org:pub:CAE508C3190C4ED7AE6A2DD190A3C332

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