Columbia subject headings:
Abbasids--Intellectual life.
Debates and debating--Islamic Empire.
Islam--Doctrines--Early works to 1800.
Islamic Empire--Intellectual life.
Marīsī, Bishr ibn Ghayāth, -833.
Maʼmūn, Caliph, 786-833.
Qurʼan--Evidences, authority, etc.--Early works to 1800.
Harvard subject headings:
Abbasids--Intellectual life.
Debates and debating--Islamic Empire.
Islam--Doctrines--Early works to 1800
Islamic Empire--Intellectual life
Marīsī, Bishr ibn Ghayāth, -833
Maʼmūn, Caliph, 786-833.
Qurʼan--Evidences, authority, etc.--Early works to 1800.
Princeton subject headings:
Abbasids--Intellectual life.
Debates and debating--Islamic Empire.
Islam--Doctrines--Early works to 1800.
Islamic Empire--Intellectual life.
Marīsī, Bishr ibn Ghayāth, -833.
Maʼmūn, Caliph, 786-833.
Qurʼan--Evidences, authority, etc.--Early works to 1800.