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Subcategories of "Energy & Environment"

BACK 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969
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 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969
Events in Japan 4 0 0 3 3 1 4 3 4 1
Events in the World 1 1 2 1 0 1 0 3 0 1
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