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Dyfyniad Arddull ChicagoIRRI. Opportunities for Biological Nitrogen Fixation in Rice and Other Non-legumes. Dordrecht: Kluwer, 1998.
Dyfyniad MLAIRRI. Opportunities for Biological Nitrogen Fixation in Rice and Other Non-legumes. Dordrecht: Kluwer, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.