Columbia subject headings:
Maritime law--United States.
Shipping conferences.
Shipping--United States.
Tariff--Law and legislation--United States.
United States. Federal Maritime Commission.
Harvard subject headings:
Maritime law--United States.
Shipping conferences
Shipping conferences--Law and legislation--United States.
Shipping--United States
Tariff--Law and legislation--United States.
United States. Federal Maritime Commission.
Princeton subject headings:
Maritime law--United States.
Shipping conferences--Law and legislation--United States.
Shipping conferences.
Shipping--United States.
Tariff--Law and legislation--United States.