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