Hill, R. T. (1893). Paleontology of the Cretaceous formations of Texas - The invertebrate paleontology of the Trinity Division. Proceedings of the Biological Society of Washington. 8(2): 9-40.
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Hill, R. T.
1893
Paleontology of the Cretaceous formations of Texas - The invertebrate paleontology of the Trinity Division
Proceedings of the Biological Society of Washington