Columbia subject headings:
Harvard subject headings:
Arab-Israeli conflict--Congresses
Central America--Social conditions--1979---Congresses.
Intifada, 1987---Congresses.
Nonviolence--Congresses
Passive resistance--Central America--Congresses.
Princeton subject headings:
Arab-Israeli conflict--1973-1993--Congresses.
Arab-Israeli conflict--Congresses.
Central America--Social conditions--1979---Congresses.
Nonviolence--Congresses.