publish year
keyword
1990年噴火 1
Mt. Unzen-Fugendake 1
agricultural disaster 1
agricultural reconstruction 1
ash fall 1
eruption in 1990 1
volcanic ash 1
火山灰 1
農業復旧 1
農業災害 1
降灰 1
雲仙・普賢岳 1
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school
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