Columbia subject headings:
Harvard subject headings:
Civilization, Medieval, in literature.
Dante Alighieri, 1265-1321. Divina commedia--Sources.
Grosseteste, Robert, 1175?-1253. De luce seu de inchoatione formarum.
Islamic civilization in literature.
Muḥammad, Prophet, -632--Isrāʼ and Miʻrāj.
Princeton subject headings:
Dante Alighieri, 1265-1321.
Grosseteste, Robert, 1175?-1253--Criticism and Interpretation.
La escala de Mahoma.