1. Prof., Kuwait Univ.; formerly Research Civ. Engr., United States Army Engr. Waterways Experiment Station, Vicksburg, Miss
2. Prof., Univ. of Florida, Gainesville, Fla. 32611; formerly Research Civ. Engr., United States Army Engr. Waterways Experiment Station, Vicksburg, Miss
3. Prof., Cambridge Univ., Cambridge, England
4. Engr., TAMS, New York, N.Y.