Thomas A. Carlson (ed.), "Khazar Steppe" in last modified August 9, 2017, http://syriaca.org/place/2963
   
      
         
            
               Khazar Steppe
               الخزر
               The steppe north of the Black Sea and the Caucasus mountains
               
                  Attestation of name الخزر in the 
                        Kitāb al-buldān of Aḥmad ibn Abī Yaʿqūb al-Yaʿqūbī.
                  
               
          
                  
                  
               
               http://syriaca.org/place/2963
               
                  Kitāb al-buldān
                  Aḥmad ibn Abī Yaʿqūb al-Yaʿqūbī
                  
                  234