	Authors	Year	Title
	House	1978	Devonian amonoids from the Appalachians and their bearing on international zonation and corelation. Special Papers Paleontology, 21: 1-70, fig.1-12, pl.1-10; London.
	Miller	1938	Devonian ammonoids of America. Special Papers, Geological Society of America, 14: 1-262, fig.1-41, pl.1-39; Baltimore.