Columbia subject headings:
Harvard subject headings:
Crusades--Eighth, 1270
Crusades--Seventh, 1248-1250
Louis IX, King of France, 1214-1270
Princeton subject headings:
Crusades--Eighth, 1270.
Crusades--Seventh, 1248-1250.
France--History--Louis IX, 1226-1270.
Louis IX, King of France, 1214-1270.