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1Erthygl
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5Erthygl
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8Cyhoeddwyd 2013This was first heard live on air at DZUP 1602 AM. Podcast uploaded at iskwiki. Click to listen
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12Cyhoeddwyd 2011Available for University of the Philippines Diliman via SpringerLink. Click here to access
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17gan Sheppard, CharlesAvailable for University of the Philippines System via Oxford Scholarship Online. Click here to access
Cyhoeddwyd 2009
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19gan Licuanan, Wilfredo Y.
Cyhoeddwyd 2009Llyfr -
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