Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Coal trade -- Great Britain, 7 canlyniadau
- Coal trade -- Wales -- Carmarthenshire, 2 canlyniadau
- Coal mines and mining -- Great Britain, 2 canlyniadau
- Coal mines and mining -- Wales -- Carmarthenshire, 1 canlyniadau
- Electricity, 1 canlyniadau
- Coal -- Great Britain, 1 canlyniadau
- Coal -- Wales -- Carmarthenshire, 1 canlyniadau
- Coal miners -- Great Britain, 1 canlyniadau
- Coal miners -- Wales -- Carmarthenshire, 1 canlyniadau
- Gas industry -- Great Britain, 1 canlyniadau