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Coal-mining
Statham, I. C. F. - 1951
Persistent link: https://www.econbiz.de/10002872489
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Productivity of underground coal workings
1965
Persistent link: https://www.econbiz.de/10001643247
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Coal
Court, W. H. B. - 1951
Persistent link: https://www.econbiz.de/10001569925
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Mechanisation in coal mines and its social consequences : Third item on the agenda
International Labour Office - 1970
Persistent link: https://www.econbiz.de/10001562283
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Competition in the Midwestern coal industry
Moyer, Reed - 1964
Persistent link: https://www.econbiz.de/10013382840