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Mining Association of Great Britain. Cyfres Coal mines and mining -- Employees -- Wales.
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Rhagolwg argraffu Gweld:

Coal industry and trade statistics,

Material comprises statistical information compiled by several different sources including the Statistical Department of the Monmouthshire and South Wales Coal Owners Association, the Board of Trade, the Mining Association of Great Britain, and by H.M.'s Inspectors of Mines. The statistics relate to various aspects of the coal mining industry, in particular to United Kingdom trade with foreign countries, the output and distribution of minerals, miners' pay and working conditions, coal export, coal production, and the coal mining and trade industries in general.