Literaturrecherche

Literatur Wellbrock N, Eickenscheidt N, Haelbich H (2014) Tree crown condition and damage causes. BFW Dokum 18/2014:11-71

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