1. 15 Blackberry Hill, Brewster, NY 10509; formerly Res. Asst., Dept. of Civ. Engrg., Polytechnic Univ.
2. Assoc. Prof., Dept. of Civ. Engrg., Univ. of Waterloo, Ontario, Canada, N2L‐3G1
3. Pres., Turkstra Lumber, Stoney Creek, Ontario, Canada, L8E‐2B3
4. Prof., Civ. Engrg., Princeton Univ., Princeton, NJ 08544