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Platonov E., Lakova I., Petrova S., Arkadiev V. (2014) Tithonian and Lower Berriasian calpionellid against ammonite biostratigraphy of the Dvuyakornaya Formation in eastern Crimea // Geologica Balcanica, 43. 1 3, Sofia, Dec. 2014. Pp. 63-76.



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