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Dyfyniad Arddull ChicagoReport of the Director General 2001 - 2002. Manila, Philippines: IRRI, 2001.
Dyfyniad MLAReport of the Director General 2001 - 2002. Manila, Philippines: IRRI, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.