- M431-439.
- Sub-series
- 1914-1977.
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- Papurau T. H. Parry-Williams ac Amy Parry-Williams,, 128 results
- Papurau Bob Owen, Croesor,, 68 results
- Papurau Carneddog, 48 results
- Papurau Thomas Gwynn Jones, 39 results
- Papurau Ap Nathan, 38 results
- Papurau Alwyn D. Rees,, 34 results
- Eisteddfod Genedlaethol Cymru: cyfansoddiadau a beirniadaethau, 32 results
- Papurau J. W. Jones, 26 results
- Archifau Urdd Gobaith Cymru, 14 results
- Papurau Gwynfor, 14 results