- BT4/3/9.
- Ffeil
- 1919, June - Aug.
Rhan oMonmouthshire and South Wales Coal Owners Association Records,
Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Mining Association of Great Britain., 3 canlyniadau
- 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
- Monmouthshire and South Wales Coal Owners' Association., 1 canlyniadau
- South Wales Miners' Federation., 1 canlyniadau
- Dalziel, Alexander., 1 canlyniadau
- Dalziel, W. Gascoyne., 1 canlyniadau
- Gibson, Finlay Albert, 1875-, 1 canlyniadau
- Pob un
- Mining Association of Great Britain., 8 canlyniadau
- Great Western Railway (Great Britain)., 5 canlyniadau
- South Wales Miners' Federation., 4 canlyniadau
- Powell Duffryn Associated Collieries Limited., 3 canlyniadau
- Amalgamated Anthracite Collieries Ltd., 3 canlyniadau
- Ffaldau Colliery (Pontycymer, Wales)., 3 canlyniadau
- Dalziel, Alexander., 2 canlyniadau
- Foot, Robert William, 1889-, 2 canlyniadau
- Rhymney Iron Company., 2 canlyniadau
- Duffryn Rhondda Colliery., 2 canlyniadau
- Pob un
- Wages -- Coal miners -- Wales, South., 6 canlyniadau
- Pit-wood., 3 canlyniadau
- Western Colliery (Nant-y-moel, Wales), 3 canlyniadau
- Coal -- Research -- Wales., 3 canlyniadau
- Labor disputes -- Wales, South., 3 canlyniadau
- Coal -- Transportation -- Wales, South., 2 canlyniadau
- Coal miners -- Diseases -- Wales, South., 2 canlyniadau
- Strikes and lockouts -- Coal mining -- Wales, South., 2 canlyniadau
- Coal trade -- Law and legislation -- Great Britain., 2 canlyniadau
- Coal mines and mining -- Employees -- Wales, South., 2 canlyniadau