Authors	Year	Title
Gordon	1960	Some American Midcontinent Carboniferous Cephalopods. Journal of Paleontology 34: 133-151, pls.27,28, 3 text-figs.,Tulsa, OK.
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.
Smith	1903	The Carboniferous Ammonoids of America. Monography, U.S. geological Survey, 42: 1-211, pl.1-29; Washington.