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Hidlo yn ôl (14 canlyniad, wedi trefnu yn ôl y diweddaraf)
Adroddiad thematig | 17/05/2018
pdf, 940.23 KB Added 17/05/2018
Adroddiad thematig | 15/09/2016
pdf, 621.61 KB Added 15/09/2016
Adroddiad thematig | 01/10/2014
pdf, 644.94 KB Added 01/10/2014