Columbia subject headings:
Halabjah (Iraq)--History--Bombardment, 1987.
Iran-Iraq War, 1980-1988--Aerial operations, Iraqi.
Harvard subject headings:
Halabjah (Iraq)--History--Bombardment, 1988
Iran-Iraq War, 1980-1988--Aerial operations, Iraqi.
Iran-Iraq War, 1980-1988--Kurds
Princeton subject headings:
Chemical warfare--Iraq--Halabjah.
Halabjah (Iraq)--History--Massacre, 1988.
Iran-Iraq War, 1980-1988--Chemical warfare.