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1Foilsithe / Cruthaithe 1986“...Oxford University Press for the Oxford Institute for Energy Studies,...”
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2de réir Pollitt, Michael G.“...Oxford University Press for the Oxford Institute of Energy Studies,...”
Foilsithe / Cruthaithe 1995
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3Foilsithe / Cruthaithe 1986“...Published by the Oxford University Press for the Oxford Institute for Energy Studies,...”
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