- 7/1-6.
- Sub-series
Part of Papurau Bob Owen, Croesor,
Part of Papurau Bob Owen, Croesor,
Part of Papurau Bob Owen, Croesor,
Part of Papurau Bob Owen, Croesor,
Part of Papurau Bob Owen, Croesor,
Part of Papurau Bob Owen, Croesor,
Part of Papurau Bob Owen, Croesor,
Part of Papurau Bob Owen, Croesor,
Part of Papurau Bob Owen, Croesor,
Part of Papurau Bob Owen, Croesor,
Part of Papurau Bob Owen, Croesor,
Gweler hefyd Bocsys 20, 30 a 43.
Part of Papurau Bob Owen, Croesor,
Amrywiol Gyrff a Sefydliadau A-Ll.
Amrywiol Gyrff a Sefydliadau M-Y.
Beirniadaethau cystadlaethau adrodd.
Part of Papurau Brinli,
Part of Papurau Brinli,
Part of Papurau Brinli,
Part of Archifau Urdd Gobaith Cymru
Part of Archifau Urdd Gobaith Cymru
Ffeiliau o ohebiaeth rhwng R. E. Griffith a threfnwyr lleol,
Part of Archifau Urdd Gobaith Cymru
Papurau amrywiol a gohebiaeth Gwennant Davies, Pennaeth Adran Hyfforddi Urdd Gobaith Cymru,
Part of Archifau Urdd Gobaith Cymru