Columbia subject headings:
Foreign trade regulation--Philippines--Periodicals.
Philippines--Commerce--Periodicals.
Philippines--Commercial policy--Periodicals.
Tariff--Government policy--Philippines.
Tariff--Philippines.
Harvard subject headings:
Foreign trade regulation--Philippines--Periodicals.
Philippines--Commerce--Periodicals.
Philippines--Commercial policy--Periodicals.
Princeton subject headings:
Foreign trade regulation--Philippines--Periodicals.
Periodicals.
Philippines--Commerce--Periodicals.
Philippines--Commercial policy--Periodicals.