Authors
B. Hannrup
Skogforsk (The Forestry Research Institute of Sweden), Uppsala Science Park, S-751 83, Uppsala, Sweden
G. Jansson
Skogforsk (The Forestry Research Institute of Sweden), Uppsala Science Park, S-751 83, Uppsala, Sweden
Ö. Danell
Reindeer husbandry unit, Swedish University of Agricultural Sciences, P.O. Box 7023, S-750 07, Uppsala, Sweden