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A palynostratigraphy of the Berriasian to Barremian of the Speeton Clay of Speeton, England
| Duxbury, S. | |
| 1977 | |
| Palaeontographica Abt. B vol.160 pp.17-67 pl.15 | |
| A palynostratigraphy of the Berriasian to Barremian of the Speeton Clay of Speeton, England |
Duxbury, S., 1977; A palynostratigraphy of the Berriasian to Barremian of the Speeton Clay of Speeton, England. Palaeontographica Abt. B vol.160 pp.17-67 pl.15