Columbia subject headings:
Central America--Economic integration--Periodicals.
Permanent Secretariat of the General Treaty for Central American Economic Integration--Periodicals.
Harvard subject headings:
Central America--Economic integration--Periodicals.
Permanent Secretariat of the General Treaty for Central American Economic Integration--Periodicals.
Princeton subject headings:
Central America--Economic integration--Periodicals.
Permanent Secretariat of the General Treaty for Central American Economic Integration--Periodicals.