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by Underdal, Arild; Hanf, Kenneth
by Underdal,Arild
by Underdal, Stanley J.
by Bang, Guri; Underdal, Arild; Andresen, Steinar
by Edward L. Miles, Arild Underdal, Steinar Andresen, Jorgen Wettestad, Tora Skodvin and Elaine M. Carlin
by Underdal, Arild; Young, Oran R.
by Underdal, A.; Young, Oran R.
by Underdal, A.