Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Monmouthshire and South Wales Coal Owners' Association -- Archives., 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