Columbia subject headings:
Harvard subject headings:
Commercial products--European Economic Community countries--Classification.
Iron industry and trade--European Economic Community countries.
Non-tariff trade barriers--European Economic Community countries.
Steel industry and trade--European Economic Community countries
Princeton subject headings:
Commercial products--European Economic Community countries--Classification.
Iron industry and trade--European Economic Community countries.
Non-tariff trade barriers--European Economic Community countries.
Steel industry and trade--European Economic Community countries.