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Barremian phytoplankton from Speeton, east Yorkshire
| Duxbury, S. | |
| 1980 | |
| Palaeontographica Abt. B vol.173 pp.107-146 pl.13 | |
| Barremian phytoplankton from Speeton, east Yorkshire |
Duxbury, S.; 1980; Barremian phytoplankton from Speeton, east Yorkshire. Palaeontographica Abt. B vol.173 pp.107-146 pl.13