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1Published 1981Sverdlovsk : Akademi︠i︡a nauk SSSR, Uralʹskiĭ nauch. ︠t︡sentr, 1981.117 p. : ill. ; 22 cm.Subjects: “...Biotic communities Russia (Federation) Ob River...”
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2Published 1983Sverdlovsk : Akademi︠i︡a nauk SSSR, Uralʹskiĭ nauch. ︠t︡sentr, 1983.147 p. : ill. ; 22 cm.Subjects: “...Freshwater ecology Russia (Federation) Ob River....”