1. Professor and Kellet Fellow, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin, Madison, WI 53706.
2. Civil Engineer, Road and Pavement Design Division, Bureau of Materials, Analysis and Inspection, Dept. of Highways, Bangkok, Thailand.
3. Engineer, Malcolm Pirnie, Schaumburg, IL 60173.
4. Associate Research Hydrogeologist, Division of Hydrologic Sciences, Desert Research Institute, Reno, NV 89512.