	Authors	Year	Title
	Gordon	1960	Some American Midcontinent Carboniferous Cephalopods. Journal of Paleontology 34: 133-151, pls.27,28, 3 text-figs.,Tulsa, OK.
	Gordon	1965	Carboniferous Cephalopods of Arkansas. Professional Papers, U.S. Geological Survey, 460: 1-322, fig.1-96, pl.1-32; Washington. [imprint 1964].
	Manger, Miller & Mapes	1992	Age and Correlation of the Gene Autry Shale, Ardmore Basin, Southern Oklahoma. Oklahoma Geological Survey Circular, 94: 101-109, pl.1, 3 figs.
	McCaleb & Furnish	1964	The Lower Pennsylvanian ammonoid genus Axinolobus in the Southern Midcontinent. Journal of Paleontology, 38 (2): 249-255, fig.1-3, pl.40; Tulsa,Oklahoma.
	McCaleb	1968	Lower Pennsylvanian Ammonoids from the Bloyd Formation of Arkansas and Oklahoma. Special Paper of the geological Society of America, 96: 1-123, fig.1-27, pl.1-12; Boulder,Colorado.
	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.
	Unklesbay	1962	Pennsylvanian Cephalopods of Oklahoma. Bulletin of the Oklahoma Geological Survey, 96: 1-150, fig.1-16, tab.1-2, pl.1-19; Norman.