Institution: | Dept. Forest Ecology, P.O. Box 27, 00014 Univ. of Helsinki, Finland;;University of Toronto, 27 King's College Circle, Toronto, ON M5S 1A1, Canada;;Finnish Forest Research Institute, P.O. Box 68, 80101 Joensuu, Finland;;Dept. of Physical Sciences, P.O. Box 64, 00014 Univ. of Helsinki, Finland;;Finnish Forest Research Institute, Kaironiementie 54, 39700 Parkano, Finland |