Columbia subject headings:
Italy, Southern--History--535-1268.
Normans--Italy, Southern.
Normans--Italy--Sicily.
Sicily (Italy)--History--1016-1194.
Sicily (Italy)--History--1194-1282.
Sicily (Italy)--Kings and rulers.
Sicily (Italy)--Politics and government--To 1282.
Harvard subject headings:
Italy, Southern--History--535-1268.
Normans--Italy, Southern.
Normans--Italy--Sicily.
Sicily (Italy)--History--1016-1194
Sicily (Italy)--History--1194-1282
Sicily (Italy)--Kings and rulers.
Sicily (Italy)--Politics and government--To 1282
Princeton subject headings:
Italy, Southern--History--535-1268.
Normans--Italy, Southern.
Normans--Italy--Sicily.
Sicily (Italy)--History--1016-1194.
Sicily (Italy)--History--1194-1282.
Sicily (Italy)--Kings and rulers.
Sicily (Italy)--Politics and government--To 1282.