Protoconifera
- Citations total:
- 3
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| details | Nd | Nd | Jansonius,J. et al. Genera File of fossil spores. Supplement 3 | 1979 | |
| details | Triassic | Poland | Orlowska-Zwolinska,T. et al. Flora of the Triassic microflora | 1970 | |
| details | Permian | Nd | Neviani,I. The stratigraphic value of conifer pollen in the Mesozoic | 1963 |