Microorganism
- Citations total:
- 2
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| details | Middle Precambrian | Canada(Ontario) | Barghoorn,E.S. et al. Microorganisms of Middle Precambrian age from the Animikie Series, Ontario, Canada. | 1965 | |
| details | USSR(Siberia) | Mendelson,C.V. Studies in micropaleontology: Proterozoic microfossils, Ordovician microphytoplankton and recent agglutinated foraminifera. | 1981 |