Agnico Eagle
Allied Chemical
Arthur McKee
Asamera Minerals
Brown & Root (Tenneco)
Clariant
Codelco
Compania Minera La Parenna
Cypress Bagdad Copper
Falcon Explorations
Flour Daniel Chile
GNF (Phillipines)
Hycroft Resources
Jacobs Engineering
Kappes Cassiday
Kennecott Copper
Kiewit Mining
Kvaerner Metals
Lyntek Inc.
McConnelsville, Ohio
Minera Anglo
Minera Homestake
Minera Homestake
Minnesota Mining
Molybdenum Corp
Mountain States
Nelson Brothers
Phelps Dodge Morencia
Process Technology
Rio Tinto
Round Mountain Gold
Silver State Mining
Solvay Minerals
Solvay Soda Ash
Tenneco Minerals
U. S. Borax
Uranium Recovery Corp
Vale Inco