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Dyfyniad Arddull ChicagoBiofuels and the Sustainability Challenge: Aglobal Assessment of Sustainability Issues, Trends and Policies for Biofuels and Related Feeds. Roma: Food and agricukture organization of the united nations, 2013.
Dyfyniad MLABiofuels and the Sustainability Challenge: Aglobal Assessment of Sustainability Issues, Trends and Policies for Biofuels and Related Feeds. Roma: Food and agricukture organization of the united nations, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.