Thomas A. Carlson (ed.), "Ṭabaristān" in last modified August 9, 2017, http://syriaca.org/place/2971
   
      
         
            
               Ṭabaristān
               طبرستان
               A region in northern Iran
               
               
                  Attestation of name طبرستان in the 
                        Kitāb al-buldān of Aḥmad ibn Abī Yaʿqūb al-Yaʿqūbī.
                  
               
          
                  
                  
               
               http://syriaca.org/place/2971
               https://en.wikipedia.org/wiki/Tabaristan
               https://dbpedia.org/resource/Tabaristan
               
                  Kitāb al-buldān
                  Aḥmad ibn Abī Yaʿqūb al-Yaʿqūbī
                  
                  269