1. Hydr. Eng. Laboratory, Dept. of Civ. Eng., Univ. of Illinois, Urbana, Ill.
2. Engr., Ecole Nationale des Ponts & Chaussees Societe des Grands Equipements Marocains , Agadir, French Morocco.
3. Asst. Prof. of Civ. Eng., Carnegie Inst. of Technology, Pittsburgh, Pa,