	Authors	Year	Title
	Gordon	1986	Late Kinderhookian (Early Mississippian) Ammonoids of the Western United States. Journal of Paleontology, Mem. 19: 1-36, fig.1-12, tab.1-6; Tulsa, Okla.
	Miller & Youngquist	1947	The discovery and significance of a cephalopod fauna in the Mississippian Caballero formation of New Mexico. Journal of Paleontology, 21: 113-117, pl.27-28; Tulsa, Oklahoma.