Ar Drywydd Enwau LleoeddCymdeithas Enwau Lleoedd Cymru, Gareth A. Bevan, G. Angharad Fychan, Hywel Wyn Owen, Ann Parry Owen · First published 2021Open the Tome
Geiriadur prifysgol cymruGareth A. Bevan, Patrick J. Donovan, M. A. · First published 1998Open the Tome
Dictionary of the Welsh Language, Volume IGareth Bevan, Patrick J. Donovan · First published 1967Open the Tome
Geiriadur Prifysgol CymruR. J. Thomas, Gareth Bevan, Patrick Donovan · First published 1967Open the Tome
