Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Botany -- Early works to 1800., 4 canlyniadau
- Welsh language -- Glossaries, vocabularies, etc. -- Latin -- Early works to 1800, 3 canlyniadau
- Welsh language -- Glossaries, vocabularies, etc. -- English -- Early works to 1800, 2 canlyniadau
- Medicine -- Formulae, receipts, prescriptions -- Early works to 1800., 1 canlyniadau
