Authors Year Title
Aboussalam & Becker 2001 Prospects for an upper Givetian substage.
Mitteilungen des Museum für Naturkunde Berlin, Geowissinschaftliche Reihe, 4: 83-99, 3 text-figs., 3 pls., 2 tabls.
Hall 1886 5th annual report of the State geologist for 1885.
1-47, pl.1-14; Albany.
House 1962 Observations on the ammonoid succesion of the North American Devonian.
Journal of Paleontology, 36: 247-284, fig.1-15, tab.1-3, pl.43-48; Tulsa, Okla.
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.