Spore sp.D1
- Citations total:
- 2
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| original | Nd | Nd | Lyuber,A.A. et al. Classification and stratigraphic value of spores of some Carboniferous Coal deposits in the USSR. | 1938 | |
| original | Carboniferous | England | Knox,E.M. The spores of Pteridophyta, with observations on microspores in Coals of Carboniferous age. | 1939 |