Columbia subject headings:
Motazilites.
Qāsim ibn Ibrāhīm, -860 or 861.
Zaydīs.
Harvard subject headings:
Motazilites.
Qāsim ibn Ibrāhīm al-Rassī, -860.
Zaydīs.
al-Qāsim ibn Ibrāhīm al-Rassī, -860.
Princeton subject headings:
Motazilites.
Qāsim ibn Ibrāhīm, -860 or 861.
Zaydīs.