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- Papurau'r Academi Gymreig / The Welsh Academy Papers,, 2 results
- Papurau Gwynfor Evans/Gwynfor Evans Papers,, 1 results
- Papurau D. J. Williams, Abergwaun, 1 results
- Papurau Iorwerth C. Peate,, 1 results
- Casgliad Urdd Gobaith Cymru : Accumulated photographs., 1 results
- Papurau Ymchwil Dr David Jenkins, Penrhyn-coch,, 1 results
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- Williams, R. Bryn, 7 results
- Parry, Thomas, 1904-1985, 2 results
- Roberts, Kate, 1891-1985, 2 results
- Parry-Williams, T. H. (Thomas Herbert), Sir, 1887-1975, 2 results
- Williams, D. J. (David John), 1885-1970, 2 results
- Morgan, Derec Llwyd, 2 results
- Williams, Morris T. (Morris Thomas), 1900-1946, 2 results
- Williams, John Ellis, 1901-1975, 2 results
- Thomas, Gwyn, 1936-, 1 results
- Humphreys, Emyr -- Photographs, 1 results