Krayeva, E. Y. (1970). Some new representatives of the genus Cibicides from the Upper Eocene of the North Black Sea Rgion. Paleontologicheskiy Sbornik Lvov. 7(1): 20-25.
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Krayeva, E. Y.
1970
Some new representatives of the genus Cibicides from the Upper Eocene of the North Black Sea Rgion
