	Authors	Year	Title
	Gordon & Poole	1968	Mississppian-Pennsylvanian Boundary in Southwestern Nevada and Southeastern California. Geological Society of America Memoir, 110: 157-168, 4 figs., 2 pls.
	Gordon	1969	Early Pennsylvanian Ammonoids from Southern Nevada. Professional Paper, U.S. Geological Survey, 613-C, 1-13, 12 text-fig., Washington.