1. Swiss Federal Institute of Technology, Zurich
2. Lamont-Doherty Geological Observatory, Palisades, New York 10964
3. University of Bern, Bern, Switzerland
4. Mobil Exploration and Production Services, Inc., Dallas, Texas 75221
5. Florida State University, Tallahassee 32306
6. Geology Institute, Strasbourg, France
7. Munich University, Munich, West Germany
8. University of Edinburgh, Edinburgh, Scotland
9. U.S. Geological Survey, Menlo Park, California 94025
10. Exxon Production Research Company, Houston, Texas 77001
11. Scripps Institution of Oceanography, La Jolla, California 92093
12. University of Houston, Houston, Texas 77004
13. City University of New York, Flushing 10021