Full reference OpenMind biblio ref
Nasr, Seyyed. 1964. An Introduction to Islamic Cosmological Doctrines: Conceptions of Nature and Methods Used for Its Study by the Ikhwān Al-Ṣafāʾ, Al-Bīrūnī, and Ibn Sīnā.. Cambridge: Belknap; Harvard University.
{ Seyyed Nasr, 1964 #1194 }