digi.library.tu.ac.th - /research_paper/107/


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10/14/2016 1:16 PM 443567 01title-english-abstract.pdf
10/14/2016 1:16 PM 569551 02chapter1.pdf
10/14/2016 1:16 PM 376397 03chapter2.pdf
10/14/2016 1:16 PM 1047798 04chapter3.pdf
10/14/2016 1:16 PM 480958 05chapter4.pdf
10/14/2016 1:16 PM 371680 06references.pdf