Thomas A. Carlson (ed.), "Sarkhas" in last modified August 9, 2017, http://syriaca.org/place/3001
   
      
         
            
               Sarkhas
               سرخس
               A city of Khurasan between Naysābūr and Merv
               
               
                  Attestation of name سرخس in the 
                        Kitāb al-buldān of Aḥmad ibn Abī Yaʿqūb al-Yaʿqūbī.
                  
               
          
                  
                  
               
               http://syriaca.org/place/3001
               https://en.wikipedia.org/wiki/Sarakhs
               https://dbpedia.org/resource/Sarakhs
               
                  Kitāb al-buldān
                  Aḥmad ibn Abī Yaʿqūb al-Yaʿqūbī
                  
                  287