Columbia subject headings:
Hadith--Authorities.
Harvard subject headings:
Faryābī, Maḥmūd ibn Aḥmad, -1210 or 1211. Khāliṣat al-ḥaqāʼiq wa-niṣāb ghāyat al-daqāʼiq.
Hadith--Authorities--Early works to 1800
Islam--Doctrines--Early works to 1800
Princeton subject headings:
Hadith--Authorities.