|
Elias |
1938 |
Studies of Late Paleozoic ammonoids.
Journal of Paleontology, 12 (1): 86-100, pl.19,20; Tulsa,Oklahoma.
|
|
|
Newell |
1936 |
Some Mid-Pennsylvanian invertabrates from Kansas and Oklahoma: III. Cephalopoda.
Journal of Paleontology, 10: 481-489, fig.1-2, pl.68-72; Menasha,Wis.
|