| |
Cocks, Leonard Robert Morrison. The biostratigraphy of the upper Ordovician and lower Silurian of south-west Dyfed, with comments on the Hirnantia fauna. by L.R.M.Cocks and D.Price. In Palaeontology, 1975, vol.18, part 4. London : Palaeontological Association, 1975, Palaeontology, 1975, vol.18, part 4.S.703-724, : .
| | |
|