Forest condition in Europe: 2007 technical report of ICP Forests - Martin Lorenz; Richard Fischer; Georg Becher; Oliver Granke; Peter Roskams; Hans-Dietrich Nagel; Philipp Kraft (Federal Research Centre for Forestry and Forest Products (BFH), Institute for World Forestry, 2007)
urn:nbn:de:gbv:253-200912-dk040406-0
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