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1Veröffentlicht 2013Available for University of the Philippines System via SAGE Knowledge. Click here to access
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2Veröffentlicht 2013Available for University of the Philippines Baguio via SAGE Knowledge. Click here to access
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3Veröffentlicht 2011Available for University of the Philippines Diliman via SpringerLink. Click here to access
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4Veröffentlicht 2005Available for University of the Philippines Diliman via Gale Virtual Reference Library. Click here to access
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5Veröffentlicht 2005Available for University of the Philippines Baguio via Gale Virtual Reference Library. Click here to access
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6von Abenoja, Macrina K.Full text access requires UP Webmail login
Veröffentlicht 1997
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