Columbia subject headings:
Civilization, Medieval.
Communication--History--To 1500.
Europe--Intellectual life--To 1500.
Harvard subject headings:
Civilization, Medieval
Communication--Europe--History--To 1500.
Communication--History--To 1500.
Europe--Intellectual life--To 1500.
Princeton subject headings:
Civilization, Medieval.
Communication--History--To 1500.
Europe--Intellectual life--To 1500.