199 
Rio Tinto-Zine Corp. Ltd., 6 St. James’ Square, London SW1Y 4LD, England. 
Attention: Sir J.N.V. Duncan OBH, Chairman. 
Salzgitter Aktiengesellschaft, D-3320 Salzgitter 41, P.O. Box 41 11 29, Federal 
Republic of Germany. Attention : Office of the Chairman. 
Summa Corp., Ocean Mining Division, P.O. Box 99006, Houston, Tex, 77011. 
Attention: Mr. P. G. Reeve, General Manager. 
Sumitomo Ocean Development & Engineering Co., Ltd., 2-2, 1-chome, Hitosubashi, 
Chiyoda-ku, Toyko, Japan. Attention: Mr. J. Tamura, Managing Director. 
Sumitomo Shoji Kaisha, Ltd., 5-15, Kitahama, Higashiku, Osaka 541, Japan. 
Attention: Yukio Shibayama, President. 
Superior Oil Co., First City National Bank Building, Houston, Tex. 77002, At- 
tention : Mr. H. B. Keck, President. 
Teck Corp., Ltd., Suite 4900 (P.O. Box 49), Toronto-Dominion Centre, Toronto 
1, Ontario, Canada, Attention: Mr. N. B. Keevil, President. 
_ August Thyssen-Htitte AG, 41 Duisburg-Homborn, Kaiser-Wilhelm-Strasse 100, 
Postfach 67, Federal Republic of Germany. Atttention: Dr. D. Spethmann, 
President. 
Occidental Minerals Corp., 6073 West 44th Avenue, Wheat Ridge, Colo. 80033. At- 
tention: Mr. P. A. Bailly, President. 
Ocean Resources, Inc., P.O. Box 2244, La Jolla, Calif. 92087. Attention: Dr. John 
Mero, President. 
., Placer Development Ltd., 1030 West Georgia Street, Vancouver 5, B.C., Canada. 
' Attention: Mr, T. H. McClelland, President. 
Phelps Dodge Corp., 300 Park Avenue, New York, N.Y. 10022. Attention: Mr. G. 
B. Munroe, President. 
Preussag Aktiengesellschaft, D-300 Hannover 1, P.O. Box 4829, Leibnizufer 9, 
Federal Republic of Germany. Attention: Mr. G. Sassmannshausen, Chair- 
man. 
Utah International, Inc., 550 California Street, San Francisco, Calif. 94104. At- 
tention: Mr. A, M. Wilson, President. 
