Literaturrecherche

Literatur Becher G, Lorenz M, Haelbich H, Mues V (2014) Tree crown condition and damage causes. Thünen Working Paper 19:10-54

Literatur Ferretti M, Sanders TGM, Michel AK (eds) (2014) The impact of nitrogen deposition and ozone on the sustainability of European forests : ICP forests 2014 Executive Report. Hamburg: ICP Forests, 28 p