Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Decentralization in government -- Wales, 2 canlyniadau
- Coal miners -- Diseases -- Wales, South., 1 canlyniadau
- Political parties -- Wales, 1 canlyniadau
- Pressure groups -- Wales, 1 canlyniadau
- Coal mines and mining -- Wales, 1 canlyniadau
- Water-supply -- Wales, 1 canlyniadau
- Lungs -- Dust diseases -- Wales, 1 canlyniadau
- Socialism -- Wales., 1 canlyniadau