Columbia subject headings:
Harvard subject headings:
Central America--Civilization--Congresses.
Central America--Economic conditions--1979---Congresses.
Central America--Foreign relations--1979---Congresses.
Central America--Politics and government--1979---Congresses.
Central America--Social conditions--1979---Congresses.
Princeton subject headings:
Central America--Civilizations--Congresses.
Central America--Economic conditions--1979-
Central America--Foreign relations--1979--Congresses.
Central America--Politics and government--1979---Congresses.
Central America--Social conditions--1979---Congresses.