Authors	Year	Title
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.
Miller & Furnish	1958a	Middle Pennsylvanian Schistoceratidae (Ammonoidea). Journal of Paleontology, 32 (2): 253-268, fig.1-9, pl.33-34; Tulsa,Oklahoma.
Smith	1903	The Carboniferous Ammonoids of America. Monography, U.S. geological Survey, 42: 1-211, pl.1-29; Washington.