Columbia subject headings:
Central America--Foreign relations--United States.
Grupo de Contadora.
Latin America--Foreign relations--1948-1980.
United States--Foreign relations--Central America.
Harvard subject headings:
Central America--Foreign relations--United States.
Grupo de Contadora.
Latin America--Foreign relations--1948-
United States--Foreign relations--Central America.
Princeton subject headings:
Central America--Foreign relations--United States.
Grupo de Contadora.
Latin America--Foreign relations--1948-1980.
Latin America--Foreign relations--1980-
United States--Foreign relations--Central America.