Title: Struktura, sostoi︠a︡nie i okhrana ėkosistem Prikhoperʹi︠a︡
Subjects: Ecology, Biotic communities, Nature conservation, Environmental protection, Environmental sciences, Geography. anthropology. recreation, Natural history (General), Regions of Russia. Periphery
Places: Russia (Federation), Saratovskai︠a︡ oblastʹ