1. Department of Mineral Resources, Geological Survey of Sweden (SGU), PO Box 670, SE-75128 Uppsala, Sweden
2. Department of Earth Sciences, Uppsala University, Villavägen 16, SE-75236 Uppsala, Sweden
3. Geological Survey of Finland (GTK), PO Box 77, FI-96101 Rovaniemi, Finland
4. Centre for Minerals and Materials, Geological Survey of Denmark and Greenland (GEUS), Øster Voldgade 10, DK-1350 Copenhagen, Denmark
5. Mineral Resources Section, Geological Survey of Norway, PO Box 6315, Torgarden, N-7491 Trondheim, Norway
6. Geological Survey of Finland, PO Box 96, FI-02151 Espoo, Finland
7. Ministry of Mineral Resources, Government of Greenland, PO Box 930, GL-3900 Nuuk, Greenland