1. U. S. Geological Survey, Menlo Park, CA 94025
2. University of Utah, Salt Lake City, UT 84112
3. Stanford University, Stanford, CA 94305
4. Northern Arizona University, Flagstaff, AZ 86011
5. University of Nevada, Reno, NV 89557
6. CICESE, Ensenada, Mexico
7. University of Texas, Austin, TX 78712
8. U.S. Geological Survey, Golden, CO.
9. Los Alamos National Laboratories, Los Alamos, NM 87545
10. Idaho National Engineering Laboratory, Idaho Falls, ID 83401
11. U.S. Geological Survey, Pasadena, CA
12. University of Texas at El Paso, El Paso, TX 79968
13. University of Washington, Seattle, WA 98195
14. New Mexico Institute of Mining and Technology, Socorro, NM 87801
15. Unocal Corporation, Santa Rosa, CA.
16. Montana Bureau of Mines and Geology, Butte, MT 59701
17. Boise State University, Boise, ID 83725