Organisation for Economic Co-operation and Development. Environment Directorate & ProQuest (Firm). (2008). Environmental performance of agriculture in OECD countries since 1990. OECD.
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Dyfyniad Arddull Chicago
Organisation for Economic Co-operation and Development. Environment Directorate and ProQuest (Firm). Environmental Performance of Agriculture in OECD Countries Since 1990. Paris: OECD, 2008.
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Dyfyniad MLA
Organisation for Economic Co-operation and Development. Environment Directorate and ProQuest (Firm). Environmental Performance of Agriculture in OECD Countries Since 1990. OECD, 2008.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.