1. Member, ASCE
2. Prof., Univ. of Oslo, P.O. Box 1047, Blindern, N-0316 Oslo, Norway; and Spec. Adviser, Norwegian Geotech. Inst., P.O. Box 3930, Ullevaal Stadion, N-0806 Oslo, Norway.
3. Head of Geotech. Lab., Norwegian Geotech. Inst., P.O. Box 3930, Ullevaal Stadion, N-0806 Oslo, Norway.
4. Sr. Engr., Norwegian Geotechnical Institute, P.O. Box 3930, Ullevaal Stadion, N-0806 Oslo, Norway.