Columbia subject headings:
Roger II, King of Sicily, 1095-1154.
Sicily (Italy)--History--Roger II, 1105-1154--Sources.
Harvard subject headings:
Roger II, King of Sicily, 1095-1154.
Sicily (Italy)--History--Roger II, 1105-1154--Sources.
Princeton subject headings:
Roger II, King of Sicily, 1095-1154.
Sicily (Italy)--History--Roger II, 1105-1154--Sources.