(1999). OECD environmental data = Donnees OCDE sur l'environnement: Compendium 1985. OECD Publishing.
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Dyfyniad Arddull Chicago
OECD Environmental Data = Donnees OCDE Sur L'environnement: Compendium 1985. Paris: OECD Publishing, 1999.
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Dyfyniad MLA
OECD Environmental Data = Donnees OCDE Sur L'environnement: Compendium 1985. OECD Publishing, 1999.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.