http://www.phrae.go.th/tem/tip/nature_phrae/nature3.html
http://2g.pantip.com/cafe/blueplanet/topic/E12215848/E12215848.html
http://lukphrae.blogspot.com/2011/02/blog-post_19.html
http://www.touronthai.com/%E0%B8%A7%E0%B8%B1%E0%B8%
http://www.bloggang.com/mainblog.php?id=busabap&month=23-03-2009&group=21&gblog=1
http://thaimisc.pukpik.com/freewebboard/php/vreply.php?user=maejonet&topic=21&page=648