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Bychkov, Y. M.; Dagys, A. S.; Efimova, A. F.; Polubotko, I. V. (1976). Atlas triasovoy fauny i flory severo-vostoka SSSR [Atlas of the Triassic Fauna and Flora of Northeastern USSR]. NEDRA, Moskva, 267 pp. (incl. 72 pls.).
Bychkov, Y. M.; Dagys, A. S.; Efimova, A. F.; Polubotko, I. V. (1976). Atlas triasovoy fauny i flory severo-vostoka SSSR [Atlas of the Triassic Fauna and Flora of Northeastern USSR]. NEDRA, Moskva, 267 pp. (incl. 72 pls.).