	Authors	Year	Title
	Elias	1956	Upper Mississippian and Lower Pennsylvanian Formations of south-central Oklahoma. In: Petroleum geology of southern Oklahoma. Volume 1. American Association of Petroleum Geologists, 1956: 56-134, 2 fig., 4 tab., 6 pl.; Tulsa, Okla.
	Gordon	1960	Some American Midcontinent Carboniferous Cephalopods. Journal of Paleontology 34: 133-151, pls.27,28, 3 text-figs.,Tulsa, OK.
	Gordon	1965	Carboniferous Cephalopods of Arkansas. Professional Papers, U.S. Geological Survey, 460: 1-322, fig.1-96, pl.1-32; Washington. [imprint 1964].
	McCaleb, Quinn & Furnish	1964	The ammonoid family Girtyoceratidae in the Southern Midcontinent. Circular Oklahoma geological Survey, 67: 1-41, 8 figs., pl.1-4; Norman, Okla.
	Miller & Youngquist	1948	The cephalopod fauna of the Mississippian Barnett Formation of Central Texas. Journal of Paleontology, 22: 649-671, fig.1-3, pl.94-100; Tulsa, Okla.
	Miller & Downs	1950b	Additional ammonoids from the Mississippian Barnet Formation of Texas. Journal of Paleontology, 24: 575-576, fig.1, pl.78; Tulsa, Okla.
	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.
	Plummer	1950	The Carboniferous rocks of the Llano region of Central Texas. Publications of the University Texas, 4329: 1-170, pl.1-21; Austin.
	Smith	1903	The Carboniferous Ammonoids of America. Monography, U.S. geological Survey, 42: 1-211, pl.1-29; Washington.
	Youngquist	1949a	The cephalopod fauna of the White Pine shale of Nevada. Journal of Paleontology, 23: 276-305, fig.1-3, pl.59-64; Tulsa, Okla.