1. 
   Vrbas
   (from the article `Bosnia and Herzegovina`) The principal rivers are the Sava, a tributary of the Danube, which forms the northern boundary with Croatia; the Bosna, Vrbas, and Una, which flow ...
   Found op http://www.britannica.com/eb/a-z/v/37
   
   
2. 
   Vrbas
   [river] The Vrbas (Cyrillic: Врбас) is a major river in western Bosnia and Herzegovina. It is a right tributary of the river Sava. The city of Banja Luka is located on the river banks. It lent its name to one of the provinces (banovinas) of the Kingdom of Yugoslavia, the Vrbas Banovina....
   Found op http://en.wikipedia.org/wiki/Vrbas_(river)
   
   

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