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1
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2Rhif Galw: S III 2834 ; S III 2834 aLlyfr
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3Rhif Galw: S III 0339Llyfr
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4Rhif Galw: S III 1013Llyfr
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5Awduron Eraill: “...Ernst, Mathias...”
Rhif Galw: S III 1510Llyfr