Thomas A. Carlson (ed.), "Indian Ocean" in last modified August 9, 2017, http://syriaca.org/place/2929 Indian Ocean بحر الهند وفارس والصين The ocean bordering East Africa, South Asia, and Australia -20 80 Attestation of name بحر الهند وفارس والصين in the Kitāb al-aʿlāq al-nafīsa of Aḥmad ibn ʿUmar Ibn Rustah. http://syriaca.org/place/2929 https://pleiades.stoa.org/places/39352 https://en.wikipedia.org/wiki/Indian_Ocean https://dbpedia.org/resource/Indian_Ocean https://pleiades.stoa.org/places/39352 Kitāb al-aʿlāq al-nafīsa Aḥmad ibn ʿUmar Ibn Rustah 83