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吉田 真理夫, 宮地 直道, 西村 裕一, 岡田 弘. "A40 噴出物の特性と噴火の物理機構 : 1988-1989 年十勝岳噴火." Programme and Abstracts the Volocanological Society of Japan 1989.2.0 (1989) 42