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Dyfyniad Arddull ChicagoSpeight, James G; ed. Biofuels Handbook. Cambridge: Royal Society of Chemistry, 2011.
Dyfyniad MLASpeight, James G; ed. Biofuels Handbook. Royal Society of Chemistry, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.