Botryopteris dubia
- Citations total:
- 2
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| details | Autunian | Germany | Potonie,R. Synopsis of the Sporae in situ. | 1962 | |
| details | Nd | Nd | Potonie,R. Fossil sporae in situ. Comparison with the sporae dispersae. Addition to the synopsis of the sporae in situ. | 1965 |