Columbia subject headings:
Commercial products--Developing countries--Classification.
Trading companies--Developing countries--Directories.
Trading companies--Developing countries--Handbooks, manuals, etc.
Harvard subject headings:
Developing countries--Commerce--Directories.
Export sales contracts--Developing countries--Directories.
Export sales contracts--Developing countries--Handbooks, manuals, etc.
Trading companies--Developing countries--Directories.
Trading companies--Developing countries--Handbooks, manuals, etc.
Princeton subject headings:
Commercial products--Developing countries--Classification.
Trading companies--Developing countries--Directories.
Trading companies--Developing countries--Handbooks, manuals, etc.