Columbia subject headings:
Harvard subject headings:
Chemical weapons--Iraq--History--20th century.
Chemical weapons--Iraq.
Gases, Asphyxiating and poisonous--Iraq.
Human rights--Iraq
Iraq--Ethnic relations.
Kurds--Crimes against--Iraq
Kurds--Iraq
Massacres--Iraq
Political crimes and offenses--Iraq.
Princeton subject headings:
Chemical weapons--Iraq--History--20th century.
Iraq--Ethnic relations.
Kurds--Crimes against--Iraq.
Massacres--Iraq.