|
Gordon |
1957 |
Mississippian Cephalopods of Northern and Eastern Alaska.
Professional Papers, U.S. Geological Survey, 283: 1-61, fig.1-61, pl.1-6; Washington.
|
|
|
Korn, Klug & Mapes |
1999 |
Viséan and Early Namurian Ammonoids from the Tafilalt (Eastern Anti-Atlas, Morocco).
Abhandlungen der Geologischen Bundesanstalt, 54: 345-375, 11 figs., 5 tabls., 5 pls., Wien.
|