1. Principal Researcher, Policy & Planning Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, Korea
2. Senior Researcher, Mineral Resources Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, Korea
3. Principal Researcher, Resources Utilization Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, Korea
4. Principal Researcher, Mineral Resources Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, Korea