HeadingEtheridge, Robert used in: Bibliothèque nationale de France, Paris
Sources
Found inFossils of the British Islands, stratigraphically and zoologically arranged. Vol. I. Palaeozoic, comprising the Cambrian, Silurian, Devonian, Carboniferous and Permian species, with supplementary appendix brought down to the end of 1886 / by Robert Etheridge, 1888. — Encycl. Britannica. — BN Cat. gén. : Etheridge, Robert (senior)