|
Gordon |
1965 |
Carboniferous Cephalopods of Arkansas.
Professional Papers, U.S. Geological Survey, 460: 1-322, fig.1-96, pl.1-32; Washington. [imprint 1964].
|
|
|
Miller & Garner |
1955 |
Lower Mississippian cephalopods of Michigan. Part III. Ammonoids and summary.
Contributions, Museum of Paleontology. Univ. Michigan, 12: 113-173, fig.1-16, pl.1-7; Michigan.
|