Eight Hours Act,
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Eight Hours Act,
Mining Association of Great Britain,
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Mining Association of Great Britain,
Mining Association of Great Britain case,
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Mining Association of Great Britain case,
Monmouthshire and South Wales Coal Owners Association Records,
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Monmouthshire and South Wales Coal Owners Association Records,
Pitwood Department,
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Pitwood Department,
Coal industry and trade statistics,
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Coal industry and trade statistics,
Nationalisation of coal industry,
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Nationalisation of coal industry,
Mining Association of Great Britain,
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Mining Association of Great Britain,