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Dong Hun JI
Graduate School of Forest Science, Kangwon National Univ.
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Myong Jong YI
Graduate School of Forest Science, Kangwon National Univ.
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Ikuko ENDO
Graduate School of Agriculture, Hokkaido Univ.
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Dong Su CHOI
Graduate School of Agriculture, Hokkaido Univ.
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Youko WATANABE
Graduate School of Agriculture, Hokkaido Univ.
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Satoshi KITAOKA
Hokkaido Univ. Forests
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Takayoshi KOIKE
Hokkaido Univ. Forests