State of science and knowledge gaps with respect to air pollution impacts on forests: Reports from concurrent IUFRO 7.04.00 working party sessions
Percy Kevin E.
Water, Air, and Soil Pollution. Vol. 116 (1999), s. 443-448. - Dordrecht : Kluwer Academic Publishers
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https://link.springer.com/chapter/10.1007/978-94-017-1578-2_42