Siam City Cement Co. Ltd.

Siam Cement Group

Pimai Salt Co.

East Star Co.

Arcadia natural Gas Storage

North Dayton Natural Gas Storage

Inergy Savona LPG Storage Project

Bean Resources

Asia Pacific Potash Corporation

ASEAN Potash Mining Public Co., Ltd., Thailand

International Gas Consulting., Inc., Texas

Canatxx, Inc., Houston

World Bank

Unocal Corporation, Texas

Siam Submanee Co., Ltd., Thailand

Ministry of Energy, Thailand

Orvana Empresa Minera Paititi S.A., Bolivia

Diamond Hill Mining, Inc., Montana

Southwest Research Institute, San Antonio

The Winters Company, Arizona

Solution Mining Research Institute, Illinois

Electric Power Research Institute, San Francisco

US Nuclear Regulatory Commission, Washington, D.C.

Aggie Consultants Co., Ltd., Thailand

Kenber Geotechnic Co., Ltd., Thailand

Chula Unisearch, Thailand

Akara Mining Co., Ltd., Thailand

Thailand Research Fund, Thailand

Italian-Thai Development Coperation