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Koichirô GOTÔ
Faculty of Agriculture, Tokyo University of Education, Komaba, Meguro, Tokyo
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Yoshio SAKAI
Faculty of Agriculture, Tokyo University of Education, Komaba, Meguro, Tokyo
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Yoshi KAMIYAMA
Faculty of Agriculture, Tokyo University of Education, Komaba, Meguro, Tokyo
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Tatsuyoshi KOBAYASHI
Faculty of Agriculture, Tokyo University of Education, Komaba, Meguro, Tokyo