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ISSN:0378-1127|81|1|101-111

Elsevier‎(1996)‎

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By Campbell B.M.   Vermeulen S.J.   Mangono J.J.   Mabugu R.   in Energy Policy

ISSN:0301-4215|31|6|553-562

Elsevier‎(2003)‎

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