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11Argitaratua 2011Available for University of the Philippines Diliman via SpringerLink. Click here to access
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14nork Ilagan, Sheila V.Full text access requires UP Webmail login
Argitaratua 2009
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16Argitaratua 2008Available for the University of the Philippines System via SAGE Knowledge. Click here to access
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20Argitaratua 2002Available for the University of the Philippines System via SAGE Knowledge. Click here to access
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