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1Cyhoeddwyd 1979“...Conference publication (Institution of Mechanical Engineers (Great Britain))...”
Trafodyn Cynhadledd Llyfr -
2Cyhoeddwyd 1996Llyfr
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3
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4Cyhoeddwyd 1979“...Conference publication (Institution of Mechanical Engineers (Great Britain))...”
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5Cyhoeddwyd 1978“...Conference publication (Institution of Mechanical Engineers (Great Britain))...”
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