1. Asst. Prof. of Ground Water Hydrology, New Mexico Inst. of Mining and Technology, Socorro, N.M.
2. Assoc. Prof. of Civ. Engrg., Colorado State Univ., Fort Collins, Colo.; President of Scientific Software Corporation, Denver, Colo.
3. Assoc. Prof. of Civ. Engrg., Colorado State Univ., Fort Collins, Colo.