Canmlwyddiant Ysgol Dyffryn Ogwen, 1895-1995 /
Hughes, J. Elwyn.
Canolfan Astudiaethau Iaith.
[Wales] : Canolfan Astudiaethau Iaith,
1995.
Testun ar ochr fewn y clawr = Text on inside of cover
Dyffryn Ogwen School (Bethesda, Wales)
Education, Secondary