Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Monmouthshire and South Wales Coke Ovens and By-Product Works Association., 3 canlyniadau
- Coal Utilisation Council., 2 canlyniadau
- Amalgamated Anthracite Collieries Ltd., 2 canlyniadau
- United National Collieries Ltd, 1 canlyniadau
- Mining Association of Great Britain., 1 canlyniadau
- South Wales Miners' Federation., 1 canlyniadau
- Dalziel, Alexander., 1 canlyniadau
- Dalziel, W. Gascoyne., 1 canlyniadau
- Gibson, Finlay Albert, 1875-, 1 canlyniadau
- Williams, Iestyn Rhys, 1892-1955., 1 canlyniadau
- Pob un
- Powell Duffryn Associated Collieries Limited., 3 canlyniadau
- Amalgamated Anthracite Collieries Ltd., 3 canlyniadau
- Ffaldau Colliery (Pontycymer, Wales)., 3 canlyniadau
- Deep Navigation Colliery (Wales)., 3 canlyniadau
- Mining Association of Great Britain., 2 canlyniadau
- South Wales Miners' Federation., 2 canlyniadau
- Great Western Railway (Great Britain)., 2 canlyniadau
- Foot, Robert William, 1889-, 2 canlyniadau
- Rhymney Iron Company., 2 canlyniadau
- Duffryn Rhondda Colliery., 2 canlyniadau
- Pob un
- Western Colliery (Nant-y-moel, Wales), 3 canlyniadau
- Wernos Colliery., 1 canlyniadau
- Rhos Colliery., 1 canlyniadau
- Pentremawr Colliery (Pontyberem, Wales), 1 canlyniadau
- Strikes and lockouts -- Coal mining -- Wales, South., 1 canlyniadau
- Gresford Colliery Disaster, Gresford, Wales, 1934., 1 canlyniadau
- Penygraig Colliery Disaster, Rhondda, Wales., 1 canlyniadau
- Deep Navigation Colliery (Wales)., 1 canlyniadau
- Dowlais Colliery (Wales)., 1 canlyniadau
- Cwmaman Colliery (Aberdare, Wales)., 1 canlyniadau
