1. 
   Pa Sak River
   river in central Thailand. It rises in the northern portion of the Phetchabun Range and flows south through a narrow valley for 319 miles (513 km). ...
   Found op http://www.britannica.com/eb/a-z/p/1
   
   
2. 
   Pa Sak River
   The Pa Sak River (แม่น้ำป่าสัก, {RTGS|Maenam Pa Sak}, IPA, Pronunciation) is a river in central Thailand. The river originates in the Phetchabun Mountains, Dan Sai District, Loei Province, passes through Phetchabun Province as the backbone of the Province. It then passes thr...
   Found op http://en.wikipedia.org/wiki/Pa_Sak_River
   
   

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