|
Quinn & Saunders |
1968 |
The ammonoids Hudsonoceras and Baschkirites in the Morrowan series of Arkansas.
Journal of Paleontology, 42; 397-402, fig.1-3, pl.57; Tulsa, Okla.
|
|
|
Saunders, Manger & Gordon |
1977 |
Upper Mississippian and lower and middle Pennsylvanian ammonoid biostratigraphy of Northern Arkansas.
Oklahoma Geolological Survey Guidebook 18: 117-137, fig.1-2, tab.1-2, pl.1-6.
|