ใบงานที่ 9-16
TRANSCRIPT
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http://pioneer.netserv.chula.ac.th/~cpor
http://www.gotoknow.org/posts/33174
https://sites.google.com/site/wa
dhnxngphothi/ptithin-kar-ptibati- ngan-53
https://sites.google.com/site/adbandon/ng-2