Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Herbs -- Therapeutic use -- Wales -- Early works to 1800, 2 canlyniadau
- Meteorology, 1 canlyniadau
- Weather forecasting, 1 canlyniadau
- Traditional medicine -- Wales -- Myddfai -- Formulae, receipts, prescriptions, 1 canlyniadau
- Arithmetic, 1 canlyniadau
- Longevity -- Wales -- Tregaron, 1 canlyniadau
- Wales -- Social life and customs, 1 canlyniadau
- Cooking, 1 canlyniadau
- Names, Geographical -- Wales -- Early works to 1800, 1 canlyniadau
- Churches -- Wales -- Early works to 1800, 1 canlyniadau
