Leidy, J., 1860, Extinct vertebrata from the Judith River and Great Lignite formations of Nebraska.

Leidy, J., 1860, Extinct vertebrata from the Judith River and Great Lignite formations of Nebraska., Transactions of the American Philosophical Society 11, pp. 139-154

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https://doi.org/10.5281/zenodo.1064078

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https://doi.org/10.5281/zenodo.1064078

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