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Betekhtina, O. A. (1990). Evolyutsionnaya posledovatel'nost' i ekologicheskaya izmenchivost' nemorskikh dvustvorchatykh mollyuksov v pozdnepaleozoyskikh uglenosnykh basseynakh razlichnogo tipa [Evolutionary sequence and ecological variability of non-marine bivalves in late Paleozoic coal-bearing basins of various types]. In: Betekhtina, O. A.; Zhuravleva, I. T. (eds) Sreda i zhizn' v geologicheskom proshlom. Aspekty evolyutsii organizmov i sredy [Environment and life in the geological past. Aspects of the evolution of organisms and the environment]. Nauka, Novosibirsk, pp. 84-91.
Betekhtina, O. A. (1990). Evolyutsionnaya posledovatel'nost' i ekologicheskaya izmenchivost' nemorskikh dvustvorchatykh mollyuksov v pozdnepaleozoyskikh uglenosnykh basseynakh razlichnogo tipa [Evolutionary sequence and ecological variability of non-marine bivalves in late Paleozoic coal-bearing basins of various types]. In: Betekhtina, O. A.; Zhuravleva, I. T. (eds) Sreda i zhizn' v geologicheskom proshlom. Aspekty evolyutsii organizmov i sredy [Environment and life in the geological past. Aspects of the evolution of organisms and the environment]. Nauka, Novosibirsk, pp. 84-91.
