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1Llyfr
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2
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3LlyfrCyhoeddwyd 1964“...British Iron and Steel Research Association. Steel User Section...”
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4LlyfrCyhoeddwyd 1969“...British Iron and Steel Research Association...”
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5LlyfrCyhoeddwyd 1964“...British Iron and Steel Research Association...”
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6LlyfrCyhoeddwyd 1967“...British Iron and Steel Research Association...”
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7LlyfrCyhoeddwyd 1967“...British Iron and Steel Research Association...”
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8LlyfrCyhoeddwyd 1967“...British Iron and Steel Research Association. Plant Engineering and Energy Division...”
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9LlyfrCyhoeddwyd 1971“...British Iron and Steel Research Association. Chemical Analysis Committee...”
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10LlyfrCyhoeddwyd 1958“...British Iron and Steel Research Association. Ingot Surface Defects Sub-Committee. Steelmaking...”
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11Trafodyn Cynhadledd LlyfrCyhoeddwyd 1969“...British Iron and Steel Research Association...”
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12Trafodyn Cynhadledd LlyfrCyhoeddwyd 1970“...British Iron and Steel Research Association...”