Columbia subject headings:
Harvard subject headings:
Crusades--13th-15th centuries
Crusades--13th-15th centuries.
England--Social conditions--1066-1485.
Great Britain--History--13th century.
Great Britain--History--Edward I, 1272-1307
Princeton subject headings:
Crusades--13th-15th centuries.
England--Social conditions--1066-1485.
Great Britain--History--13th century.
Great Britain--History--Edward I, 1272-1307.