Polymorphisporites nebulus
- Citations total:
- 2
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| original | Stephanian | France(Nievre) | Alpern,B. et al. Description of some microspores of the French Permo-Carboniferous. | 1958 | |
| original | Middle Stephanian | France(Allier) | Alpern,B. Contribution to the palynological and petrographic study of French Coals. | 1959 |