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1
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2Cyhoeddwyd 1954
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3Cyhoeddwyd 1971
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4Cyhoeddwyd 1954
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5
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7Cyhoeddwyd 1972
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12gan Jaroszewicz, Piotr
Cyhoeddwyd 1975
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13Cyhoeddwyd 1968
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14Cyhoeddwyd 1972
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