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Subcategories of "Social /Safety sytem science"

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Social /Safety sytem science BACK
Natural disaster/Disaster prevention science 0 0 0 0 0 0 0 0 0 0
BACK 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959
Events in Japan 1 3 1 2 5 4 4 1 1 3
Events in the World 1 0 0 1 0 2 1 0 1 0
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