1. Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-11 Japan 292-82-6205
2. AECL Research, Chalk River Laboratories, Chalk River, Ontario, Canada (613) 584-3311, Ext. 2277
3. Battelle, Pacific Northwest Laboratory P. O. Box 999, Richland, WA 99352 (509) 376-3424