1. Prof., Dept. of Civ., Environmental and Architectural Engrg., Univ. of Colorado, Boulder, Colo.
2. Dept. of Civ. Engrg., New Mexico State Univ., Las Cruces, N.M.
3. Bundesanstalt fuer Materialpruefung, Berlin. Germany
4. Dept. of Civ. Engrg., Univ. of California, Davis, Calif.
5. Bundesanstalt fuer Materialpruefung, Berlin, Germany
6. Ente Nazionale per l'Energia Eletrica, Milan, Italy
7. Dept. of Civ. Engrg., Imperial College, London, England
8. Ingenieuerbuero, Dr. Kupfer, Munich, Germany; formerly, Technical Univ., Munich, Germany
9. Dept. of Civ., Environmental and Architectural Engrg., Univ. of Colorado, Boulder, Colo.
10. ASCHLCONSULT, Munich, Germany; formerly, Technical Univ., Munich, Germany