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1Published 1982“...Ministry of Energy,...”
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4Published 1983“...Ministry of Energy,...”
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7Published 1984“...Ministry of Energy],...”
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8Published 1980“...The Ministry of Energy,...”
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9Published 1979“...Ministry of Energy,...”
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11Published 1981“...Ministry of Energy,...”
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15Published 1983“...Ministry of Energy,...”
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16Published 1983“...Ministry of Energy],...”
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