Affiliation: | Benzion Barlev is Senior Lecturer at the Hebrew University, Jerusalem, but part of this paper was written while he was with the University of Texas at Austin. Haim Levy is a Professor at the Hebrew University, Jerusalem, and the University of Florida at Gainsville. The authors wish to acknowledge the technical assistance and helpful comments of Mr. Zvi Lerman and Miss Rebecca Falk, and the comments of an anonymous referee. |