Thomas A. Carlson (ed.), "al-Rass" in last modified August 9, 2017, http://syriaca.org/place/2953
   
      
         
            
               al-Rass
               الرس
               A river flowing from near Erzerum in modern Turkey through Armenia and Adharbayjān
               
               
                  38.5 46.5
               
               
                  Attestation of name الرس in the 
                        Kitāb al-aʿlāq al-nafīsa of Aḥmad ibn ʿUmar Ibn Rustah.
                  
               
          
               http://syriaca.org/place/2953
               https://pleiades.stoa.org/places/884118
               https://en.wikipedia.org/wiki/Aras_(river)
               https://dbpedia.org/resource/Aras_(river)
               
                  https://pleiades.stoa.org/places/884118
                  
               
               
                  Kitāb al-aʿlāq al-nafīsa
                  Aḥmad ibn ʿUmar Ibn Rustah
                  
                  89