Miller, S. A. & Gurley, F. E. (1896). New species of Palaeozoic invertebrates from Illinois and other states. Bulletin of the Illinois State Museum of Natural History. 11, 5-50.
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Miller, S. A. & Gurley, F. E.
1896
New species of Palaeozoic invertebrates from Illinois and other states
Bulletin of the Illinois State Museum of Natural History