1. Department of Environmental Sciences, University of Virginia, Charlottesville, VA 22903.
2. U.S. Geological Survey, National Center, MS 432, Reston, VA 22092.
3. Climatic Research Unit, University of East Anglia, Norwich, NR4 7TJ, England.
4. Lawrence Livermore Laboratory, University of California, P.O. Box 808, Livermore, CA 94550.
5. U.S. Geological Survey, WRD, 345 Middlefield Rd., MS 21, Menlo Park, CA 94025.
6. U.S. Geological Survey, Denver Federal Center, MS 416, Box 25046, Lakewood, CO 80225.
7. Department of Geological & Geophysical Sciences, Princeton University, Princeton, NJ 08540.
8. Australian Atomic Energy Commission Research Establishment, Lucas Heights, N.S.W., Australia.
9. Institut de Geologie, 1, rue Blessig, 67084 Strasbourg, France.
10. Department of Civil and Mineral Engineering, University of Minnesota, Minneapolis, MN 55455.
11. Department of Geological Sciences, University of Rochester, Rochester, NY 14627.
12. Department of Earth & Planetary Sciences, The Johns Hopkins University, Baltimore, MD 21218.
13. Department of Soil & Environmental Sciences, University of California, Riverside, CA 92521.
14. Department Civil Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139.
15. State of New York Dept. of Health, New Scotland Avenue, Albany, NY 12201.
16. Department of Geology, University of Kentucky, Lexington, KY 40506.