Columbia subject headings:
Harvard subject headings:
Cairo Genizah.
Commerce--History--500-1500, Medieval--Sources.
Halfon ben Nethanel, ha-Levi, abu Saʻid, active 12th century.
India--Commerce--History--To 1500--Sources.
Jewish merchants--India--History.
Judah, ha-Levi, active 12th century.
Princeton subject headings:
Cairo Genizah.
Commerce--History--500-1500, Medieval--Sources.
Ḥalfon ben Nethanel, ha-Levi, abu Saʻīd, active 12th century.
India--Commerce--History--To 1500--Sources.
Jewish merchants--India--History.
Judah, ha-Levi, active 12th century.