The lower Reticuloceras (R1) goniatite succession in the Namurian of the North of England.
Proceedings of the Yorkshire Geological Society, 24 (6): 383-440, fig.1, pl.23-30; Wakefield.
Foord
1903
Monograph of the Carboniferous Cephalopoda of Ireland, Part V, Containing the families Glyphioceratidae (concluded) and Prolecanitidae, with title-page and index.
