เอกสารการประชุมวิชาการและเสนอผลงานวิจัย มหาวิทยาลัยทักษิณ ครั้งที่ 19 2552 - page 958

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* Corresponding author : Ú¦«´¡šr 081-6900593Email-Sman0035@hotmail.com