1. Professor, Dept. of Civil, Construction, and Environmental Engineering, San Diego State Univ., San Diego, CA 92182-1324.
2. Senior Engineer, J.A. Cesare and Associates, Inc., 7108 S. Alton Way, Bldg. J, Centennial, CO 80112.
3. Professor Emeritus, Dept. of Civil and Environmental Engineering, Arizona State Univ., Tempe, AZ 85287-5306.
4. Professor, Dept. of Civil and Environmental Engineering, Arizona State Univ., Tempe, AZ 85287-5306.