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3Published in Springer eBooks. (2011)Available for University of the Philippines Diliman via SpringerLink. Click here to access
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4Published 2010Available for University of the Philippines Diliman via Wiley Online Library. Click here to access
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6Published 2010Available for University of the Philippines Baguio via Wiley Online Library. Click here to access
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7by Magat, Severino S.
Published 2005Electronic Resource -
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