เอกสารการประชุมวิชาการและเสนอผลงานวิจัย มหาวิทยาลัยทักษิณ ครั้งที่ 19 2552 - page 1337

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* Corresponding author : Ú¦«´¡šr/Ú¦µ¦ 074-288775Email-yutthana.t@psu.ac.th