Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Museum of Economic Geology, 3 canlyniadau
- Hills-Johnes, Elizabeth, 1834-1927, 2 canlyniadau
- Playfair, Lyon Playfair, Baron, 1818-1898, 2 canlyniadau
- Ramsay, Elizabeth, 2 canlyniadau
- Ramsay, Eliza, 2 canlyniadau
- Sharpe, James, Glasgow, 2 canlyniadau
- Williams, W. R. Stuart, 2 canlyniadau
- Ramsay, John C., 2 canlyniadau
- Dolaucothi Estate (Wales), 1 canlyniadau
- Margam Estate (Wales), 1 canlyniadau
- Pob un
- Schools -- Wales -- Llandovery., 2 canlyniadau
- Lead mines and mining -- Wales -- Ceredigion, 1 canlyniadau
- Merioneth (Wales), 1 canlyniadau
- Europe -- Description and travel., 1 canlyniadau
- Scotland -- Description and travel, 1 canlyniadau
- Astronomy, 1 canlyniadau
- France -- Description and travel, 1 canlyniadau
- Allt Ogofau (Cynwyl Gaeo, Wales), 1 canlyniadau
- Dolaucothi Estate (Wales), 1 canlyniadau
- Gold mines and mining -- Wales -- Carmarthenshire, 1 canlyniadau
