1. Oarai Research Establishment, Japan Atomic Energy Research Institute, Narita-cho, Oarai-machi, Higashi-Ibaraki-gun, Ibaraki-ken 311-13, Japan 81-29-264-8579
2. The Japan Steel Works, Ltd. 4 Chatsu-cho, Muroran-shi, Hokkaido 051, Japan 81-143-22-9211