Authors Year Title
Bisat 1924 The Carboniferous goniatites of the North of England and their zones.
Proceedings of the Yorkshire Geological Society, 20: 40-124, pl.1-10; Leeds.
Bisat 1928 The Carboniferous goniatite zones of England and their continental equivalents.
Congrès de Stratigraphie Carbonifère, Heerlen 1927, C.R.B.: 117-133, pl.6, 6a; Liège.
Bisat 1932 On some lower Sabdenian goniatites.
Transactions of the Leeds Geological Association, 5: 27-36, pl.1-2; Kendal.
Bisat 1934b Anthracoceras from the E2 Zone of the Namurian.
Transactions of the Leeds Geologists Association, 5: 112-117, fig.1-3; Kendal.
Hudson 1945 The Goniatite Zones of The Namurian.
Geological Magazine, 82 (1): 1-9; London.
Hudson 1946 The Namurian goniatites Cravenoceratoides bisati Hudson and Ct. lirifer n.sp.
Proceedings of the Yorkshire Geological Society, 25 (6): 375-386, pl.21,21A; Wakefield.