Columbia subject headings:
Abū Yūsuf Yaʻqūb, 731 or 732-798. Kharāj.
Economics--Religious aspects--Islam.
Finance, Public--Islamic Empire.
Property (Islamic law)
Real property tax--Islamic Empire.
Harvard subject headings:
Abū Yūsuf Yaʻqūb, 731 or 732-798. Kharāj.
Economics--Religious aspects--Islam
Finance--Islamic countries--History.
Princeton subject headings:
Abū Yūsuf Yaʻqūb, 731 or 732-798. Kharāj.
Economics--Religious aspects--Islam.
Finance--Islamic countries--History.