Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Dolaucothi Estate (Wales), 4 canlyniadau
- Geological Survey of Great Britain., 3 canlyniadau
- Smyth, Warington W. Sir, (Warington Wilkinson), 1817-1890., 1 canlyniadau
- Geological Survey of Great Britain, 1 canlyniadau
- Playfair, Lyon Playfair, Baron, 1818-1898, 1 canlyniadau
- Ramsay, Elizabeth -- Correspondence, 1 canlyniadau
- Williams, Stuart, Rev., 1 canlyniadau
- Buchanan, Claude -- Death and burial, 1 canlyniadau
- Ramsay, Elizabeth, 1 canlyniadau
- Museum of Economic Geology, 1 canlyniadau
