Reports of H.M. Inspectors of Mines and Quarries under the Mines and Quarries Act 1954.
Great Britain.Mines and Quarries Inspectorate.
London : H.M. Stationery Off.,
Great Britain. Mines and Quarries Inspectorate.
Mine inspection
Reports of H.M. Inspectors of Mines and Quarries under the Health and safety at work, etc. act, 1974. South Wales district