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Rizqi Prastowo
Mining Engineering, Institut Teknologi Nasional Yogyakarta
Indonesia
Hurien Helmi
Geology Engineering, Institut Teknologi Nasional Yogyakarta
Indonesia
Obrin Trianda
Geology Engineering, Institut Teknologi Nasional Yogyakarta
Indonesia
Rofiqul Umam
School of Science and Technology, Kwansei Gakuin University
Japan