Title: Ėkotoksikologii͡a︡ i biogeokhimii͡a︡ geograficheskikh populi͡a︡t͡s︡iĭ ptit͡s︡
Subjects: Air quality, Biogeochemistry, Bird population, Birds, Ecology, Environmental aspects of Pollution, Geographical distribution, Pollution, Bird populations
Places: Russia (Federation)