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- Wages -- Coal miners -- Wales, South., 2 results
- Coal miners -- Diseases -- Wales, South., 2 results
- Pit-wood., 1 results
- Coal -- Research., 1 results
- Work environment -- Wales., 1 results
- Coal mines and mining -- Safety measures -- Wales, South., 1 results
- Mining schools and education -- Wales, South., 1 results
- Coal miners -- Pensions -- Great Britain., 1 results
- Coal -- Research -- Wales., 1 results
- Labor disputes -- Wales, South., 1 results
