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Nutty slack: Merthyr Vale colliery
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Nutty slack: Merthyr Vale
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Nutty slack: Merthyr Vale colliery
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Nutty slack: Merthyr Vale colliery
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Nutty slack: Site of Merthyr Vale colliery
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Nutty slack: Site of Merthyr Vale colliery
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Nutty slack: Aberfan victims