Roth, B. & Hartman, J. H. (1998). A probable Cerion (Gastropoda: Pulmonata) from uppermost Cretaceous Hell Creek Formation, Garfield County, Montana. PaleoBios. 18(2-3): 16-20.
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Roth, B. & Hartman, J. H.
1998
A probable <em>Cerion</em> (Gastropoda: Pulmonata) from uppermost Cretaceous Hell Creek Formation, Garfield County, Montana