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21Published 2011Available for University of the Philippines Diliman via SpringerLink. Click here to access
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23Published 2011Available for University of the Philippines Diliman via SpringerLink. Click here to access
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24Published in Springer eBooks. (2011)Available for University of the Philippines Diliman via SpringerLink. Click here to access
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29by Alontaga, Aileen YungFull text access requires UP Webmail login
Published 2008
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30by Andam, Cheryl Mae PalacayFull text access requires UP Webmail login
Published 2007
Electronic Resource