1. Assistant Professor, Dept. of Civil and Geological Engineering, New Mexico State Univ., Las Cruces, N.M. 88003.
2. Professor, Dept. of Civil and Geological Engineering, New Mexico State Univ., Las Cruces, N.M. 88003.
3. Assistant Professor, Civil Engineering Dept., Valparaiso Univ., Valparaiso, IN 46383.