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Hidlo yn ôl (5 canlyniad, wedi trefnu yn ôl y diweddaraf)
Adroddiad thematig | 22/03/2018
pdf, 1.42 MB Added 22/03/2018
Adroddiad thematig | 13/07/2017
pdf, 1.25 MB Added 13/07/2017
Adroddiad thematig | 01/05/2014
pdf, 558.46 KB Added 01/05/2014
Adroddiad thematig | 01/10/2013
pdf, 439.42 KB Added 01/10/2013