Institution: | Department of Physical Sciences, University of Helsinki, P.O. Box 64, 00014, Finland;Department of Forest Ecology, University of Helsinki, P.O. Box 27, 00014, Finland;Finnish Forest Research Institute, Vantaa Research Unit, P.O. Box 18, 01301 Vantaa, Finland;Department of Applied Chemistry and Microbiology, University of Helsinki, P.O. Box 27, 00014, Finland |