Thomas A. Carlson (ed.), "Sūdān" in last modified August 9, 2017, http://syriaca.org/place/2948
   
      
         
            
               Sūdān
               السودان
               The region of sub-Saharan Africa
               
                  Attestation of name السودان in the 
                        Kitāb al-aʿlāq al-nafīsa of Aḥmad ibn ʿUmar Ibn Rustah.
                  
               
          
                  
                  
               
               http://syriaca.org/place/2948
               https://en.wikipedia.org/wiki/Sudan_(region)
               https://dbpedia.org/resource/Sudan_(region)
               
                  Kitāb al-aʿlāq al-nafīsa
                  Aḥmad ibn ʿUmar Ibn Rustah
                  
                  88