Betekhtina, O. A., & Gra︠t︡sianova, R. T. (1979). Fauna i stratigrafi︠i︡a srednego i verkhnego paleozo︠i︡a Sibiri: Sb. stateĭ. Nauka, Sib. otd-nie.
Chicago Style (17th ed.) CitationBetekhtina, O. A., and R. T. Gra︠t︡sianova. Fauna I Stratigrafi︠i︡a Srednego I Verkhnego Paleozo︠i︡a Sibiri: Sb. Stateĭ. Novosibirsk: Nauka, Sib. otd-nie, 1979.
MLA (8th ed.) CitationBetekhtina, O. A., and R. T. Gra︠t︡sianova. Fauna I Stratigrafi︠i︡a Srednego I Verkhnego Paleozo︠i︡a Sibiri: Sb. Stateĭ. Nauka, Sib. otd-nie, 1979.
Warning: These citations may not always be 100% accurate.