Authors	Year	Title
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.
Shumard	1863	Descriptions of new Paleozoic fossils. Transactions of the St.Louis Academy of Science, 2: 108-113; St. Louis.
Smith	1903	The Carboniferous Ammonoids of America. Monography, U.S. geological Survey, 42: 1-211, pl.1-29; Washington.