Hymenophyllum obtusum
- Citations total:
- 2
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| details | Early Jurassic | USSR(Krasnoyarsk Kray) | Sakanova,N.S. Spore-pollen complexes of coal bearing deposits of the Kansk Basin. (In: Mesozoic and Tertiary deposits of Central Siberia) | 1957 | |
| details | Middle Jurassic | USSR(Yakut ASSR) | Bobrov,A.K. The geological make-up of Yakuts ASSR and its oil gas potential. (In: Geological Symposium #5) | 1960 |