Thomas A. Carlson (ed.), "Warthān" in last modified August 9, 2017, http://syriaca.org/place/2954
   
      
         
            
               Warthān
               ورثان
               A city on the river al-Rass
               
               
                  39.57459 47.721084
               
               
                  Attestation of name ورثان in the 
                        Kitāb al-buldān of Aḥmad ibn Abī Yaʿqūb al-Yaʿqūbī.
                  
               
               
                  Attestation of name ورثان in the 
                        Kitāb al-aʿlāq al-nafīsa of Aḥmad ibn ʿUmar Ibn Rustah.
                  
               
          
                  
                  
               
               http://syriaca.org/place/2954
               https://pleiades.stoa.org/places/884224
               
                  https://pleiades.stoa.org/places/884224
                  
               
               
                  Kitāb al-buldān
                  Aḥmad ibn Abī Yaʿqūb al-Yaʿqūbī
                  
                  271
               
               
                  Kitāb al-aʿlāq al-nafīsa
                  Aḥmad ibn ʿUmar Ibn Rustah
                  
                  89