|
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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|
Saunders |
1973 |
Upper Mississippian Ammonoids from Arkansas and Oklahoma.
Special Papers of the Geological Society of America, 145: 1-110, fig.1-32, tab.1-8, pl.1-8; Boulder Colorado.
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