Boulaya
- Citations total:
- 4
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| details | Nd | Nd | Remy,W. The systematics of the Pteridosperms including consideration of their pollen. | 1953 | |
| details | Nd | Nd | Potonie,R. Position of the Paleozoic spore genera in the natural system. | 1954 | |
| details | Carboniferous | Nd | Potonie,R. The spores of Palaeozoic plants in the natural (Morphologic) system | 1954 | |
| details | Late Mississippian | Permian | Nd | Millay,M.A. et al. Paleozoic seed fern pollen organs. | 1979 |