Columbia subject headings:
Harvard subject headings:
Crusades--First, 1096-1099--Early works to 1800.
Jerusalem--History--Latin Kingdom, 1099-1244--Early works to 1800.
Normans--Italy--History--To 1500.
Princeton subject headings:
Crusades--First, 1096-1099--Early works to 1800.
Jerusalem--History--Latin Kingdom, 1099-1244--Early works to 1800.