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Hidlo yn ôl (5 canlyniad, wedi trefnu yn ôl y diweddaraf)
Adroddiad thematig | 20/09/2017
pdf, 1.31 MB Added 20/09/2017
Adroddiad thematig | 22/09/2016
pdf, 1.1 MB Added 22/09/2016
Adroddiad thematig | 01/07/2014
pdf, 1.01 MB Added 01/07/2014
Adroddiad thematig | 01/03/2010
pdf, 1.27 MB Added 01/03/2010