Columbia subject headings:
Karmathians.
Ḥasan al-Aʻṣam al-Qarmaṭi, active 10th century.
Harvard subject headings:
Karmathians--History--Sources.
Ḥasan al-Aʻsam ibn Aḥmad, 891-977.
Princeton subject headings:
Hasan al-Aʾsam al-Qarmati, 10th cent.
Karmathians.