Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Germany -- Description and travel, 2 canlyniadau
- France -- Description and travel., 1 canlyniadau
- Switzerland -- Description and travel, 1 canlyniadau
- Wales -- Description and travel, 1 canlyniadau
- Austria -- Description and travel, 1 canlyniadau
- Mines and mineral resources -- Sweden, 1 canlyniadau
- Lead, 1 canlyniadau
- Lead ores, 1 canlyniadau
- Copper, 1 canlyniadau
- Brass, 1 canlyniadau