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Hidlo yn ôl (5 canlyniad, wedi trefnu yn ôl y diweddaraf)
Adroddiad thematig | 19/10/2021
pdf, 974.77 KB Added 19/10/2021
Adroddiad thematig | 20/12/2018
pdf, 682.96 KB Added 20/12/2018
Adroddiad thematig | 12/06/2017
pdf, 1.58 MB Added 12/06/2017
Adroddiad thematig | 01/10/2015
pdf, 546.81 KB Added 01/10/2015