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Organisation for Economic Co-operation and Development and ProQuest (Firm). IEA Scoreboard 2011 Implementing Energy Efficiency Policy: Progress and Challenges in IEA Member Countries. Paris: OECD Pub. : International Energy Agency, 2011.

Organisation for Economic Co-operation and Development and ProQuest (Firm). IEA Scoreboard 2011 Implementing Energy Efficiency Policy: Progress and Challenges in IEA Member Countries. OECD Pub. : International Energy Agency, 2011.