Forest condition in Europe: 2004 technical report of ICP Forests - Martin Lorenz; Georg Becher; Volker Mues; Richard Fischer; E. Ulrich; Matthias Dobbertin; S. Stofer (Federal Research Centre for Forestry and Forest Products (BFH), Institute for World Forestry, 2004)
urn:nbn:de:gbv:253-200912-dk040083-6
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