Laaksovirta, K/ Olkkonen, H 1977: Epiphytic lichen vegetation and element contents of Hypogymnia physodes and pine needles examined as indicators of air pollution at Kokkola, W Finland. - Ann. Bot. Fenn.14: 112-130. [RLL List # 99 / Rec.# 10824] Keywords: FINLAND/ HYPOGYMNIA/ AIR POLLUTION/ EPIPHYTES/ ELEMENT ANALYSIS
Abstract: 9 figures. 6 tables.
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