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1Trafodyn Cynhadledd LlyfrCyhoeddwyd 1977“...Institution of Engineers, Australia. National Committee on Manufacturing Engineering...”
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2Trafodyn Cynhadledd LlyfrCyhoeddwyd 1980“...Institution of Engineers, Australia. National Committee on Manufacturing Engineering...”
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3Trafodyn Cynhadledd LlyfrCyhoeddwyd 1986“...Institution of Engineers, Australia. National Committee on Manufacturing Engineering...”