%A Schulze, E.-D. (Ernst-Detlef) %A Lange, O. L. (Otto Ludwig) %A Oren, Ram %T Forest decline and air pollution : a study of spruce (Picea abies) on acid soils %I Springer-Verlag %D 1989 %S Ecological studies : analysis and synthesis %V v. 77 %U https://ci.nii.ac.jp/ncid/BA07739484