Full reference OpenMind biblio ref
Al-Bīrūnī, Abū. 1967. The Determination Of The Coordinates Of Positions For The Correction Of Distances Between Cities; A Translation From The Arabic Of Kitāb Taḥdīd Nihāyāt Al-Amākin Li-Taṣḥīḥ Masāfāt Al-Masākin. Tran. Jamil Ali. Beirut: The American University of Beirut.
{ Jamil Ali, Abū Al-Bīrūnī, 1967 #392 }