1. Member, ASCE
2. Former Grad. Student, Dept. of Civ. Engrg., Johns Hopkins Univ., Baltimore, MD 21218-2686.
3. Prof., Dept. of Civ. Engrg., Johns Hopkins Univ., Baltimore, MD.
4. Prof., Dept. of Geography and Envir. Engrg., and Dept. of Civ. Engrg., Johns Hopkins Univ., Baltimore, MD.