	Authors	Year	Title
	Furnish & Knapp	1966	Lower Pennsylvanian fauna from Eastern Kentucky; Part 1, Ammonoids. Journal of Paleontology, 40: 296-308, fig.1-5, pl.35; Tulsa, Okla.
	Miller & Faber	1892	Description of some Subcarboniferous and Carboniferous Cephalopoda. Journal of the Cincinnati Society of natural history, 14: 164-168, pl.6;
	Miller & Gurley	1896	New species of Palaeozoic invertebrates from Illinois and other states. Bulletin of the Illinois State Museum of Natural History, 11: 1-50, pl.1-5; Springfield, IL.
	Plummer & Scott	1937	Upper Paleozoic ammonites in Texas. The geology of Texas, vol.3 pt.1, Bull. Texas. Univ., 3701: 1-516, fig.1-88, pl.1-41; Austin, Texas.