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S. MAEGAWA
Coll. of Lib. Arts and Sci,, Kyoto Univ.
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N. FUJIWARA
Fac. of Sci., Kyoto Univ.
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T. KOHMOTO
Coll. of Lib. Arts and Sci,, Kyoto Univ.
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T. GOTO
Coll. of Lib. Arts and Sci,, Kyoto Univ.
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H. TANAKA
Fac. of Sci., Tokyo Engi. Univ.
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K. IIO
Fac. of Sci., Tokyo Engi. Univ.