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Cerdyn post yn dangos Gweithfeydd Mwyn...

Casgliad: 62 eitem

Archif Cof - Mwyngloddio

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Tomen sbwriel Gwaith y Fron, Cwmystwyth

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Penyrorsedd

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Boeleri Chwarel Dorothea

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Gweithwyr Pen y Bont, Chwarel Oakeley's,...

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Chwarel Penmaenmawr

Casgliad: 34 eitem

Cymru 1900-2000: Rhan 3

Casgliad: 75 eitem

Y Diwydiant Llechi