	Authors	Year	Title
	Furnish & Saunders	1971	Ammonoids from the Middle Chester Beech Creek Limestone, St. Clair County. University of Kansas paleontological Contributions, 51: 1-14, fig.1-3, pl.1-2.
	Gordon	1971	Goniatites americanus n. sp., a late Meramec (Mississippian) index fossil. Professional Paper US Geol.Survey 750-C: C39-C43, fig.1-3, 1 tab.; Washington.