Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Deep Navigation Colliery (Wales)., 3 canlyniadau
- Risca Colliery., 1 canlyniadau
- Nantyglo and Blaina Ironworks Co. Ltd. (Monmouthshire, Wales)., 1 canlyniadau
- Lewis Merthyr Colliery, Trehafod., 1 canlyniadau
- Nixon, Taylor & Cory (Firm), 1 canlyniadau
- Deep Duffryn Colliery (Wales)., 1 canlyniadau