Al-Baghdadi Abu Mansur 'Abd-Al-Kahir Ibn Tahir. Moslem Schisms and Sects (Al-Fark Bain Al-Firak) Being the History of the Various Philosophic Systems Developed in Islam. Volume 1

Columbia University Press, 1920. — 224 p.Al-Farq bayn al-Firaq is a book by the Shafi'i scholar Abu Mansur al-Baghdadi (d. 1037 CE) outlining the doctrinal positions of various sects and schisms in Islam. Written as an explanation of the hadith regarding the division of the Muslim ummah into 73 sects, the book explains the hadith, lays out the various beliefs of 72 "misguided" sects and ends by explaining the beliefs of Orthodox Sunni Islam, according to the author, in 15 points. The book also outlines the doctrinal positions of sects which are not deemed to be included under the hadith.