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*Katsumi Ueno
Fukuoka Univ.
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Akira Miyahigashi
Fukuoka Univ.
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Yoshihito Kamata
Univ. Tsukuba
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Ken-ichiro Hisada
Univ. Tsukuba
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Hidetoshi Hara
GSJ, AIST
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Koji Uno
Okayama Univ.
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Thasinee Charoentitirat
Chulalongkorn Univ., Thailand
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Punya Charusiri
Chulalongkorn Univ., Thailand
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Subin Kongthipavong
Department of Geology and Minerals, Lao P. D. R.
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Khamseng Vilaykham
Department of Geology and Minerals, Lao P. D. R.