Organisation for Economic Co-operation and Development & ProQuest (Firm). (2005). Environment at a glance: OECD environmental indicators, 2005. OECD.
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Dyfyniad Arddull Chicago
Organisation for Economic Co-operation and Development and ProQuest (Firm). Environment at a Glance: OECD Environmental Indicators, 2005. Paris: OECD, 2005.
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Dyfyniad MLA
Organisation for Economic Co-operation and Development and ProQuest (Firm). Environment at a Glance: OECD Environmental Indicators, 2005. OECD, 2005.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.