Columbia subject headings:
Harvard subject headings:
El Salvador--Foreign relations--United States--Periodicals.
El Salvador--Politics and government--1979-1992--Periodicals.
United States--Foreign relations--El Salvador--Periodicals.
Princeton subject headings:
El Salvador--Foreign relations--United States--Periodicals.
El Salvador--Politics and government--1944---Periodicals.
United States--Foreign relations--El Salvador--Periodicals.