1/11/04 → 25/02/11
Project: Ymchwil
Ap Gwilym, R.
1/07/22 → 30/01/23
Tenbrink, T.
1/12/22 → 15/02/24
1/04/19 → 1/08/22
Creer, S.
1/01/14 → 31/12/16
Hughes, D.
1/04/13 → 1/08/19
1/01/22 → 30/09/23
Ware, J.
1/03/11 → 31/05/11
1/09/21 → 1/08/22
Shore, K. A.
1/10/08 → 27/04/09