1. Water Resources Engineer, The Flatwater Group, 1618 L St., Lincoln, NE 68508.
2. Professor, Dept. of Civil Engineering, The Univ. of Texas, Austin, TX 78712.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Michigan Technological Univ., Houghton, MI 49931.
4. Professor, Dept. of Management Science and Information Systems, The Univ. of Texas at Austin, Austin, TX 78712.