Title: Rasāʾil
Subjects: Ancient Science, Arab Philosophy, Arabic Encyclopedias and dictionaries, Authors, Greek, Criticism, Textual, Early works to 1800, Encyclopedias and dictionaries, Arabic, Greek authors, Ikhwān al-Ṣafāʾ, Islamic Philosophy, Philosophy, Arab, Philosophy, Islamic, Science, Science, Ancient, Sources, Textual Criticism