1. PRé Consultants bv, Printerweg 18, NL-3821 AD Amersfoort, The Netherlands
2. Kopparberg Mineral AB, Verkstadsvägen 52, S-714 36 Kopparberg, Sweden
3. Department
of Environmental Science, Faculty of Science, Radboud University Nijmegen, P.O. Box 9010, NL-65OO
GL Nijmegen, The Netherlands