University of Eastern Finland, School of Forest Science, P.0. Box 111, FI-80101 Joensuu, Finland;
Blom Kartta Oy, Kauppakatu 15,80100 Joensuu, Finland;
University of Eastern Finland, School of Forest Science, P.0. Box 111, FI-80101 Joensuu, Finland;
University of Eastern Finland, School of Forest Science, P.0. Box 111, FI-80101 Joensuu, Finland;
City of Joensuu,80100 Joensuu, Finland;
Natural Resources Institute Finland, Joensuu Unit, P.O. Box 68, FI-80101 Joensuu, Finland;