1. Assoc. Prof., School of Engrg. and Applied Sci., Univ. of California, Los Angeles, Calif
2. Prof. of Civ. Engr., Univ. of California, Berkeley, Calif
3. Assoc., Woodward-Lundgren & Assocs., Oakland, Calif., and Asst. Research Asst., Univ. of California, Berkeley, Calif
4. Grad. Research Asst., Dept. of Civ. Engrg., Univ. of California, Berkeley, Calif