Report copyright - ¸Édspace.spu.ac.th/bitstream/123456789/5375/4/บทที่ 2.pdf · ³ ¦³ ° oª¥ nª ¸ÉÁ ¸É¥ª o° ´ Å o n { ´¥ εÁ oµ ,qsxw ¦³ ª µ¦ 3urfhvv ¨ ¨·
Please pass captcha verification before submit form
Please pass captcha verification before submit form