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Dyfyniad Arddull ChicagoPlant Nutrition and Soil Management for Sustainable Agriculture: Proceeding of Lectures. Cần Thơ: CTU/JICA, 2001.
Dyfyniad MLAPlant Nutrition and Soil Management for Sustainable Agriculture: Proceeding of Lectures. Cần Thơ: CTU/JICA, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.