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3The effect of SO2 on lichens and bryophytes around Newcastle upon Tyne The effect of SO2 on lichens and bryophytes around Newcastle upon Tyneby Centrum voor Landbouwpublikaties en Landbouwdocumentatie, Council of Europe, European Congress on the influence of air pollution on plants and animals 22-27 apr.1968:, Gilbert, O. L.Texto bibliotecaUBA FA