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1 œ´„«¹„¬µž¦·µÃš ‡–³ª·š¥µ«µ˜¦r µ µª· š¥µ«µ˜¦«¹„¬µ ¤®µª·š¥µ¨´¥°»¨¦µ›µœ¸
Master's Degree Student, Faculty of Science, science education, Ubonrathani University
Corresponding author : Ú¦«´¡šr 089 – 7314278 E-mail: a_numfon@hotmail.com
2 °µ‹µ¦¥r ‡–³ª·š¥µ«µ˜¦r ¤®µª·š¥µ¨´¥°»¨¦µ›µœ¸
Faculty of Science, Ubonrathani University