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Subcategories of "Energy & Environment"

BACK 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
Energy & Environment BACK
Engine Systems 0 0 0 0 0 0 0 0 0 0
Power & Energy System 0 0 0 0 0 0 0 0 0 0
Environmental Engineering 0 0 0 0 0 0 0 0 0 0
BACK 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
Events in Japan 3 0 5 1 2 1 1 3 2 2
Events in the World 0 2 0 1 0 0 2 0 0 0
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