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