	Authors	Year	Title
	Clardy	1962	Goniatite cephalopod faunas from the Hale Formation. Compass 39 (3): 103-109, 1fig., 1tab., pl.1-2;
	Quinn & Saunders	1968	The ammonoids Hudsonoceras and Baschkirites in the Morrowan series of Arkansas. Journal of Paleontology, 42; 397-402, fig.1-3, pl.57; Tulsa, Okla.