1. Assoc. Prof. in Civ. Engrg., Purdue Univ., Lafayette, Ind.
2. Assoc. Prof. of Civ. Engrg., North Carolina State of UNC, Raleigh, N. C.
3. Engr., Geotecnica S. A., Sao Paulo, Brazil, and Instructor in Soil Mechanics and Foundation Engineering, Mackenzie Univ., Sao Paulo, Brazil