Columbia subject headings:
Crusades.
Jerusalem--History--Latin Kingdom, 1099-1244.
Harvard subject headings:
Crusades--First, 1096-1099
Godfrey, of Bouillon, approximately 1060-1100.
Jerusalem--History--Latin Kingdom, 1099-1244.
Princeton subject headings:
Crusades--Early works to 1800.
Jerusalem--History--Latin Kingdom, 1099-1244.