Columbia subject headings:
Italy, Southern--History--535-1268.
Nobility--Italy--Sicily--Biography.
Robert Guiscard, Duke of Apulia, Calabria, and Sicily, approximately 1015-1085.
Sichelgaita, di Salerno, -1090.
Sicily (Italy)--History--1016-1194.
Harvard subject headings:
Robert Guiscard, Duke of Apulia, Calabria, and Sicily, approximately 1015-1085.
Sichelgaita, di Salerno, -1090.
Princeton subject headings:
Lombards--Italy--Naples (Kingdom).
Lombards--Italy--Sicily.
Naples (Kingdom)--History--1016-1268.
Robert Guiscard, Duke of Apulia, Calabria, and Sicily, approximately 1015-1085.
Sichelgaita, di Salerno, -1090.