Columbia subject headings:
Italy--History--Germanic rule, 962-1268.
Normans--Italy--Sicily--History.
Sicily (Italy)--History--1016-1194.
Harvard subject headings:
Italy--History--Germanic rule, 962-1268.
Normans--Italy--Sicily--History
Sicily (Italy)--History--1016-1194
Princeton subject headings:
Italy--History--Germanic rule, 962-1268.
Normans--Italy--Sicily--History.
Sicily (Italy)--History--1016-1194.