	Authors	Year	Title
	Gordon	1965	Carboniferous Cephalopods of Arkansas. Professional Papers, U.S. Geological Survey, 460: 1-322, fig.1-96, pl.1-32; Washington. [imprint 1964].
	Miller	1947	A goniatite from the Mississippian Boone formation of Missouri. L. Paleont., 21: 19-21, pl.10; Tulsa, Oklahoma.