Columbia subject headings:
Crusades--Sources.
Feudal law--Jerusalem--History--Sources.
Jerusalem (Latin Kingdom)--History--Sources.
Harvard subject headings:
Crusades--History--Sources.
Crusades--Sources
Feudal law--Jerusalem (Latin Kingdom)--History--Sources.
Feudal law--Jerusalem (Latin Kingdom)--Sources.
Jerusalem (Latin Kingdom)--History--Sources.
Jerusalem--History--Latin Kingdom, 1099-1244--Sources.
Princeton subject headings:
Crusades--History--Sources.
Feudal law--Jerusalem (Latin Kingdom)--History--Sources.
Jerusalem (Latin Kingdom)--History--Sources.