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3Published 2010Available for University of the Philippines System via IG Library. Click here to access
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4Published 2009Available for University of the Philippines System via IG Library. Click here to access
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5Published 2009Available for the University of the Philippines System via SAGE Knowledge. Click here to access
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7Published 2005Available for University of the Philippines Diliman via Wiley Online Library. Click here to access
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8by Abada, Maria TeresaFull text access requires UP Webmail login
Published 1997
Electronic Resource