Columbia subject headings:
Islam--Doctrines.
Qurʼan--Criticism, interpretation, etc.
Harvard subject headings:
Ijtihād (Islamic law)
Ikhtilāf (Islamic law)
Islam--Doctrines
Qurʼan--Criticism, interpretation, etc.
Princeton subject headings:
Islam--Doctrines.
Qurʼan--Criticism, interpretation, etc.