Voitsel,Z.A. et al. (1966)
Spore and pollen assemblages of Jurassic deposits of the Ob'-Irtysh interfluve and their importance for stratigraphy. [ Sporovo-pyl'tsevyye Iompleksy Yurskikh otlozheniy Ob'-Irtyshskogo Mezhdyrech'Ya i Ikh znacheniye dlya stratigrafii. ] Akademiya Nauk SSR,Second International Conference on Palynology
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