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MAKOTO Kobayashi
Graduate School of Agriculture, Hokkaido Univ.
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S. V. Bruanin
Graduate School of Agriculture, Far Eastern State Agricultural Univ.
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A. V. Naumenko
Graduate School of Agriculture, Far Eastern State Agricultural Univ.
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Y. P. Nemilostiv
Graduate School of Agriculture, Far Eastern State Agricultural Univ.
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Toshiya YOSHIDA
Hokkaido Univ. Forests
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Fuyuki SATOH
Hokkaido Univ. Forests
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Kaichiro SASA
Hokkaido Univ. Forests
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Takayoshi KOIKE
Research Faculty of Agriculture, Hokkaido Univ.