1. Associate Professor, Univ. of Minnesota, 500 Pillsbury Dr. S.E., Minneapolis, MN 55455.
2. Structures Lab Manager, Turner-Fairbank Hwy., Research Center, Federal Highway Administration, McLean, VA 22101-2296.
3. Professor Emeritus, Lehigh Univ., 117 ATLSS Dr., Bethlehem, PA 18015.