Iowa Beef Producers, Inc.
J.E. Mincorp
J.R. Simplot Company
James Hardie Corporation Barrick Goldstrike Mines
JR. Simplot
Kaiser Engineers Lurgi
KD Engineering
Kellogg Brown & Root
Kennecott Copper Corp.
Kerr-McGee Corp.
Kilborn Engineers E.L. Bateman
Klohn Crippen
Knight Piesold
Kvaerner
Lakefield Research
Lockheed Martin
LTV Steel
Lummus M.W. Kellogg
McClelland Laboratories
Merck & Co.
Metcon Research
Minera NYCO
Minproc U.S.A
Mitsubishi Metals Mining Co. Reynolds Aluminum
Morrison-Knudsen Ford, Bacon & Davis
MRDI
Newmont Gold Company
NiCo
Noranda Hanna Mining Company
North American Lithium
Pan American Silver
Parsons
Peabody Coal Phelps Dodge
Pechiney, SA (FR)
Pegasus Gold, Inc.
Pennwalt Corporation
Pfizer Pfaudler
Phelps Dodge
Phillips 66
Pillsbury
Placer Dome, Inc.
Proctor and Gamble Company
Quebec Iron & Titanium
Ravensthorpe Nickel Operations
Raytheon
Rio Algom Ltd.
Rio Tinto Iron and Titanium
Rio Tinto
Santa Fe Pacific Gold
Selentec
SGS
Shell
Shell Oil Company
SNCo Lavalin
Southern Peru Copper
Staker Paving
Standard Oil of Ohio
Steel Mining Company
Steffen Robertson & Kirsten
Stillwater Mining
Stone Container Corp.
Sunshine Mining Company
Syncrude Canada
Timet Metals
True North Canada
Tuprag
TVX Hellas
U.S. Gold Corporation
U.S. Steel
Unipure Tintaya
US Agrichem
USMX, Inc.
Vector Engineering
Viceroy Resource Corp.
Westinghouse – Western
Wold Trona
Wyeth Ayerst
Wyzinco
Western Zirconium