Columbia subject headings:
Authority--History--To 1500.
Civilization, Medieval.
Europe--History--476-1492.
Power (Social sciences)--History--To 1500.
Written communication--History--To 1500.
Zimmermann, Michel.
Harvard subject headings:
Authority--History--To 1500.
Civilization, Medieval
Europe--History--476-1492.
Power (Social sciences)--History--To 1500.
Written communication--History--To 1500.
Zimmermann, Michel.
Princeton subject headings:
Authority--History--To 1500.
Civilization, Medieval.
Europe--History--476-1492.
Power (Social sciences)--History--To 1500.
Written communication--History--To 1500.
Zimmermann, Michel.