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Dyfyniad Arddull ChicagoFAO. FAO Animal Production and Health Paper N.137: Developing National Emergency Prevention Systems for Transboundary Animal Diseases. Rome: FAO, 1997.
Dyfyniad MLAFAO. FAO Animal Production and Health Paper N.137: Developing National Emergency Prevention Systems for Transboundary Animal Diseases. Rome: FAO, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.