http://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%A3%E0%B8%94%E0%B8%AD%E0%B8%B0%E0%B8%A1%E0%B8%B4%E0%B9%82%E0%B8%99
http://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%A3%E0%B8%94%E0%B8%AD%E0%B8%B0%E0%B8%A1%E0%B8%B4%E0%B9%82%E0%B8%99%E0%B8%88%E0%B8%B3%E0%B9%80%E0%B8%9B%E0%B9%87%E0%B8%99
http://www.tuvayanon.net/2aminof.html
http://web.ku.ac.th/schoolnet/snet5/topic8/amino.html
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