Columbia subject headings:
Harvard subject headings:
Crusades--Diseases--Jerusalem--History.
Crusades--Diseases--Palestine--History.
Crusades--Hospital care--Jerusalem--History.
Crusades--Hospital care--Palestine--History.
Crusades--Medical care--Jerusalem--History.
Crusades--Medical care--Palestine--History.
Jerusalem
Military hygiene--Jerusalem--History.
Military hygiene--Palestine--History.
Palestine
Princeton subject headings:
Crusades--Diseases--Jerusalem--History.
Crusades--Diseases--Palestine--History.
Crusades--Hospital care--Jerusalem--History.
Crusades--Hospital care--Palestine--History.
Crusades--Medical care--Jerusalem--History.
Crusades--Medical care--Palestine--History.
Military hygiene--Jerusalem--History.
Military hygiene--Palestine--History.