Columbia subject headings:
Italian literature--To 1400--History and criticism.
Literature, Medieval--History and criticism.
Riddles in literature.
Romance-language literature--History and criticism.
Harvard subject headings:
Italian literature--To 1400--History and criticism
Literature, Medieval--History and criticism
Riddles in literature.
Romance-language literature--History and criticism.
Princeton subject headings:
Italian literature--To 1400--History and criticism.
Literature, Medieval--History and criticism.
Riddles in literature.
Romance-language literature--History and criticism.