1. Sr. Engr., Galaxy Scientific Corp., 2500 English Creek Ave., Building 11, Pleasantville, NJ 08232.
2. Res. Highway Engr., Federal Highway Admin., 6300 Georgetown Pike, McLean, VA 22101.
3. Asst. Prof., Dept. of Civ. and Mineral Engrg., Univ. of Minnesota, Minneapolis, MN 55455-0220.