Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Lead mines and mining -- Wales -- Ceredigion., 2 canlyniadau
- Cardiganshire (Wales), 1 canlyniadau
- Aberystwyth (Wales), 1 canlyniadau
- Mines and mineral resources -- Wales., 1 canlyniadau
- South Hafod Mine (Wales), 1 canlyniadau
- Cwmystwyth (Wales), 1 canlyniadau
- Bwlchranos Mine (Wales), 1 canlyniadau