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Gordon |
1965 |
Carboniferous Cephalopods of Arkansas.
Professional Papers, U.S. Geological Survey, 460: 1-322, fig.1-96, pl.1-32; Washington. [imprint 1964].
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Work & Mason |
2004 |
Mississippian (late Osagean) ammonoids from the New Providence Shale Member of the Borden Formation, north-central Kentucky.
Journal of Paleontology, 78 (6), 1128-1137, 9 fig., Lawrence, KS.
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