scholarly journals Macrofossil Assemblages in the Ryazanian Stage (Lower Cretaceous) of the Stratotype Region

2019 ◽  
Vol 09 (10) ◽  
pp. 558-561
Author(s):  
Olga S. Urman ◽  
Boris N. Shurygin ◽  
Oksana S. Dzyuba
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