	Authors	Year	Title
	Sturgeon, Windle & Mapes	1982	New and revised taxa of Pennsylvanian cephalopods in Ohio and West Virginia. [M.T.Sturgeon, D.L.Windle, R.H.Mapes & R.D.Hoare]. Journal of Paleontology, 56 (6): 1453-1479, fig.1-6; Lawrence, Kansas.