Columbia subject headings:
Customs administration--Law and legislation--United States--Periodicals.
Customs administration--United States--Periodicals.
International trade--Periodicals.
U.S. Customs Service--Periodicals.
Harvard subject headings:
Customs administration--Law and legislation--United States--Periodicals.
Customs administration--United States--Periodicals.
International trade--Periodicals
U.S. Customs Service--Periodicals.
Princeton subject headings:
Customs administration--Law and legislation--United States--Periodicals.
Customs administration--United States--Periodicals.
International trade--Periodicals.
Periodicals.
U.S. Customs Service--Periodicals.