1. Members, ASCE
2. GeoSyntec Consult., 2100 Main St., Huntington Beach, CA 92648-2648.
3. GeoSyntec Consult., 1100 Lake Hearn Dr. N.E., Atlanta, GA 30342-1523.
4. Asst. Prof. of Civ. Engrg., Zagazig Univ.–Shobra Branch, Cairo, Egypt.
5. Prof. of Civ. and Envir. Engrg., Univ. of Illinois, 205 N. Mathews Ave., Urbana, IL 61801.