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3Cyhoeddwyd 1934“...Scott and Scott,...”
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4Evolution: is it scientific! Shall we teach it in our schools? An appeal to reason and common sense.gan Pettit, William H.“...Scott & Scott,...”
Cyhoeddwyd 1929
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11“...Scott,...”
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20Cyhoeddwyd 1973“...Scott, Foresman,...”
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