Columbia subject headings:
Encyclopedias and dictionaries--History and criticism.
Literature, Medieval--History and criticism.
Harvard subject headings:
Encyclopedias and dictionaries--History and criticism
Literature, Medieval--History and criticism
Princeton subject headings:
Civilization, Medieval.
Encyclopedias and dictionaries--Early works to 1800--History and criticism.
Encyclopedias and dictionaries--History and criticism.
Learning and scholarship--History--Medieval, 500-1500.
Literature, Medieval--History and criticism.