Ulrich, E. O., Foerste, A. F. & Miller, A. K. (1943). Ozarkian and Canadian cephalopods. Part II, Brevicones. Geological Society of America Special Papers. 49: 1-240.
476748
Ulrich, E. O., Foerste, A. F. & Miller, A. K.
1943
Ozarkian and Canadian cephalopods. Part II, Brevicones