| 3M |
Continental Lime |
Internation Financial Corporation |
Phelps Dodge Mining Company |
| Alta Gold |
Cordex Exploration |
Johnson Matthey Electronics |
Pinson Mining Company |
| Amselco Minerals Inc. |
Couer D' Alene Mines Corporation |
Kennecott |
Pittsburg Testing Laboratories |
| Anaconda Company |
Crested Butte Silver Mining Inc. |
Kinross Gold |
Placer (U.S.) Inc. |
| Apex Asia |
Crown Asphalt |
Lacana Gold Inc. |
Queensland Opal Corporation |
| Asamera Minerals (U.S.) Inc. |
Cyprus Mineral Company |
Lateko Resources |
Rabbit Creek Mining |
| Asarco |
Cytec |
Lone Tree Mining |
Rio Tinto |
| Association of American Railroads |
Davy McKee Corporation |
Meridian Minerals Company |
Roberts & Shaefer Company |
| B.P. Minerals |
Dee Gold |
Millpark Drilling Fluids |
Rosario Dominicana, S.A. |
| Bald Mountain Mine |
Echo Bay Mines |
Minera Rayrock, S.A. |
Round Moutain Gold |
| Barretts Talc |
Eimco PMD |
Minera Yanacocha, S.A. |
S.J. Groves |
| Barrick Mercur Gold Mines, Inc. |
EuroGold |
Minero Horizonte, S.A. |
Santa Fe Pacific Mining, Inc. |
| Barrick-Goldstrike |
Exxon Chemicals |
Minero Raura, S.A. |
Silver King Mines, Inc. |
| Behre Dolbear |
FirstMiss Gold |
Minproc (U.S.A.), Inc. |
Southern Peru Copper Corporation |
| Bond Gold Exploration |
Fischer-Watt Mining Corporation |
Miramar Mining Company |
St. Joe Minerals Corporation |
| Bureau of Land Management |
Flour Daniel Wright, Inc. |
MK Gold |
Stauffer Chemical |
| C.H. Plenge & CIA, S.A. |
Geneva Steel |
Mongolrostsvet Met |
Summo Minerals |
| Callahan Mining Corporation |
Gold Fields Mining Corporation |
Nalco Chemical |
Sunbeam Mining Corporation |
| CEntry |
Gold Standard, Inc |
Nevada Goldfields |
Sunshine Mining Company |
| Chevron Resources Company |
Golden Sunlight Mines, Inc. |
Newmont Metallurgical Services |
Tenneco Minerals Company |
| Chief Consolidated |
Greens Creek Mining Company |
Newmont Overseas Exploration Ltd. |
The Hanna Mining Company |
| CoCa Mines, Inc. |
Harmony Gold (Bissett Mine) |
Noranda Mining Company |
TVX Gold |
| Cominco American, Inc. |
Helca Mining Company |
Oroperu, S.A. |
United Nations |
| Commercial Testing Laboratories |
Homestake Mining Company |
Pacific Silver Corporation |
USMX |
| Compania De Mines Buenaventura, S.A. |
Independence Mining |
Pegasus Gold Corporation |
Western States Minerals |
| Compania Minera Polimet |
Industrial Minera Mexico, S.A. |
Pfizer, Inc. |
Zortman Mining Company |